WO2011162000A1 - Pulse wave sensor device - Google Patents

Pulse wave sensor device Download PDF

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Publication number
WO2011162000A1
WO2011162000A1 PCT/JP2011/057644 JP2011057644W WO2011162000A1 WO 2011162000 A1 WO2011162000 A1 WO 2011162000A1 JP 2011057644 W JP2011057644 W JP 2011057644W WO 2011162000 A1 WO2011162000 A1 WO 2011162000A1
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WO
WIPO (PCT)
Prior art keywords
finger
blood flow
pulse wave
light
housing
Prior art date
Application number
PCT/JP2011/057644
Other languages
French (fr)
Japanese (ja)
Inventor
亨 志牟田
Original Assignee
株式会社村田製作所
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社村田製作所 filed Critical 株式会社村田製作所
Priority to CN201180030878.4A priority Critical patent/CN102946796B/en
Priority to JP2012521351A priority patent/JP5565463B2/en
Publication of WO2011162000A1 publication Critical patent/WO2011162000A1/en

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/145—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue
    • A61B5/1455—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue using optical sensors, e.g. spectral photometrical oximeters
    • A61B5/14551—Measuring characteristics of blood in vivo, e.g. gas concentration, pH value; Measuring characteristics of body fluids or tissues, e.g. interstitial fluid, cerebral tissue using optical sensors, e.g. spectral photometrical oximeters for measuring blood gases
    • A61B5/14552—Details of sensors specially adapted therefor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B2560/00—Constructional details of operational features of apparatus; Accessories for medical measuring apparatus
    • A61B2560/04—Constructional details of apparatus
    • A61B2560/0462—Apparatus with built-in sensors

Definitions

  • the present invention relates to a pulse wave sensor device that detects a pulse wave by irradiating a finger with light or ultrasonic waves.
  • Patent Document 1 discloses a configuration in which a pressing force detection unit that detects a pressing force of a finger is provided and a function of notifying a user when the pressing force is high is added.
  • Patent Documents 2 and 3 disclose a configuration in which a light emitter is provided so as to protrude from the surroundings, and the pulse wave is easily detected by reliably bringing the light emitter into contact with a finger.
  • the pulse wave sensor device has a function of notifying the user that measurement cannot be performed because the finger pressing force is too strong.
  • this configuration even when the finger pressing force is strong and measurement is not possible, only that fact is notified. For this reason, in order to perform measurement for a certain period of time, it is necessary to stabilize the finger pressing force in a weak state, which causes a problem that a burden is imposed on the user.
  • Patent Documents 2 and 3 disclose a configuration in which a light emitter is provided so as to protrude from the surroundings and the light emitter is reliably brought into contact with a finger. However, since these do not reduce the finger pressing force, the pulse wave cannot be detected when the finger pressing force is too strong, and there is the same problem as described above.
  • the present invention has been made in view of the above-described problems, and an object of the present invention is to provide a pulse wave sensor device that can easily detect a pulse wave by reducing the inhibition of blood flow.
  • the present invention includes a housing, a light emitter provided in the housing, and a light receiver provided in the housing, and detects a pulse wave using a terminal node of a finger.
  • the light emitter and the light receiver are disposed at a position where the finger's terminal node contacts the housing, and the finger's terminal node is brought into contact with the light emitter and the light receiver.
  • the blood flow inhibition reducing portion that contacts the middle node of the finger is provided in the housing, and the housing portion in contact with the middle node of the finger in the blood flow inhibition reducing portion and the housing where the terminal node of the finger contacts
  • a step is formed between the finger and the body to reduce the pressure acting on and around the first joint portion of the finger at the end of the finger, thereby reducing blood flow inhibition at the end of the finger.
  • a pulse wave sensor device that detects a pulse wave using a fingertip
  • the finger is strongly pressed, the blood flow is inhibited and the pulse wave cannot be detected.
  • the influence of the finger on the blood flow at the end of the finger varies depending on the part of the finger to be pressed.
  • the present inventor when a portion near the first joint of the finger's end node is compressed, blood flow in the finger's end node is likely to be inhibited, and pulse waves can be detected even when a small pressing force is applied. I found it impossible.
  • the blood flow inhibition reducing portion is provided in the housing, when the user of the pulse wave sensor device makes the terminal node of the finger contact the light emitter and the light receiver, the middle node of the finger contacts the blood flow inhibition reducing portion. To do. As a result, the distal end of the finger and the middle of the finger are supported by the housing around the light emitter and the light receiver and the blood flow inhibition reducing unit, respectively. It is possible to reduce the pressing force on the portion closer to the first joint.
  • the present invention includes a casing, an ultrasonic transmitter provided in the casing, and an ultrasonic receiver provided in the casing, and detects a pulse wave using a terminal node of a finger.
  • a blood flow inhibition reducing portion that contacts the middle node of the finger is provided in the housing, a contact portion that contacts the middle node of the finger in the blood flow inhibition reducing portion, and the housing that the terminal node of the finger contacts
  • a step is formed between the first joint portion and the peripheral portion of the finger to reduce the pressure acting on the periphery of the first joint portion and the periphery thereof, thereby reducing the inhibition of blood flow at the distal node of the finger.
  • the blood flow inhibition reducing unit is provided in the housing, when the user of the pulse wave sensor device contacts the terminal node of the finger with the transmitter and the receiver, the middle node of the finger contacts the blood flow inhibition reducing unit. To do.
  • the distal end side of the finger terminal and the middle node of the finger are respectively supported by the casing around the transmitter and the receiver and the blood flow inhibition reducing unit. It is possible to reduce the pressing force on the portion closer to the first joint. For this reason, it can prevent that the site
  • the pulse wave can be easily detected.
  • a gap is formed between the region near the first joint at the terminal node of the finger and the surface of the housing by the step formed by the blood flow inhibition reducing unit.
  • a gap is formed between the region near the first joint in the terminal joint of the finger and the surface of the housing by the step formed by the blood flow inhibition reducing unit. In this case, it is possible to reduce the pressing force with respect to the region closer to the first joint, and it is possible to reduce blood flow inhibition.
  • the fingertip positioning part is provided at the surface position of the housing that contacts the tip of the finger, the position of the fingertip can be fixed and the blood flow inhibition reducing part and the middle joint of the finger can be positioned.
  • the blood flow inhibition reducing portion can be reliably brought into contact with the middle segment of the finger.
  • the blood flow inhibition reducing portion is provided with a mechanism for adjusting the contact position with the middle joint of the finger.
  • the mechanism for adjusting the contact position with the middle segment of the finger is provided in the blood flow inhibition reducing unit, for example, the contact position with the middle segment of the finger is adjusted according to the length dimension of the last segment of the finger. can do. Thereby, even when the length dimension of the terminal node of a finger changes for every user, the variation of such a dimension is permitted and the contact part of a blood flow inhibition reduction part can be made to contact a middle part of a finger.
  • FIG. 1 is a perspective view showing a pulse wave sensor device according to a first embodiment of the present invention. It is a front view which shows the pulse wave sensor apparatus of the state which the user is measuring the pulse wave. It is a top view which shows the pulse wave sensor apparatus in FIG. It is a perspective view which expands and shows the right side of the pulse wave sensor apparatus in FIG. It is a perspective view which expands and shows the light-emitting device, light receiver, blood flow inhibition reduction part, fingertip positioning part, etc. in FIG. It is a perspective view which shows the state which made the last node of a user's index finger contact the light-emitting device and light receiver in FIG. FIG.
  • FIG. 4 is a cross-sectional view of the light emitting device, the light receiving device, and the like of the pulse wave sensor device as viewed from the direction of arrows VII-VII in FIG. 3.
  • It is a block diagram which shows the electrical constitution of the pulse wave sensor apparatus by 1st Embodiment. It is explanatory drawing which shows the relationship between a blood-flow inhibition reduction part and the last node and middle node of a finger
  • FIG. 5 It is a perspective view of the same position as Drawing 5 showing the pulse wave sensor device by the 2nd modification. It is a perspective view of the same position as Drawing 5 showing the pulse wave sensor device by a 3rd embodiment. It is a perspective view of the same position as Drawing 4 showing the pulse wave sensor device by a 4th embodiment. It is a front view of the same position as Drawing 2 showing the pulse wave sensor device by the 3rd modification. It is a perspective view of the same position as Drawing 5 showing the pulse wave sensor device by the 4th modification. It is sectional drawing which shows the pulse wave sensor apparatus by 5th Embodiment. It is sectional drawing of the position similar to FIG. 7 which shows the pulse wave sensor apparatus by 6th Embodiment.
  • the arrow X direction in FIG. 1 is the left-right direction
  • the arrow Y direction is the depth direction
  • the arrow Z direction is the vertical direction.
  • the case where the pulse wave is measured using the index finger (finger F) of the right hand will be described as an example.
  • the pulse wave sensor device 1 detects a photoelectric pulse wave signal (pulse wave signal) corresponding to the pulse wave from the finger F, and based on the photoelectric pulse wave signal, oxygen saturation, acceleration Biological information such as a pulse wave and a pulse fluctuation can be generated, and an autonomic state can be estimated from the pulse fluctuation.
  • the pulse wave sensor device 1 is a small and lightweight portable device.
  • the housing 2 accommodates a light emitter 6 and a light receiver 7, which will be described later, constituting the pulse wave sensor device 1.
  • the housing 2 is formed in a substantially rectangular parallelepiped box shape using, for example, a resin material, and includes a front plate portion 2A, a peripheral wall portion 2B, and a back plate portion 2C.
  • the front plate portion 2A and the back plate portion 2C are formed in a substantially rectangular flat plate shape.
  • the peripheral wall portion 2B is sandwiched between the outer peripheral edges of the front plate portion 2A and the back plate portion 2C, and is formed in a substantially rectangular frame shape having a thickness in the depth direction.
  • a display opening 2D for fitting a display device 3 made of, for example, a liquid crystal panel or the like is formed in the central portion of the front plate portion 2A, and the display device 3 is attached to the housing 2 through the display opening 2D. It has been.
  • a switch 4 for switching between starting and stopping of measurement is attached to the front plate portion 2A and is located on the right side of the display opening 2D.
  • two element openings 2E and 2F having a small opening area are formed on the right side of the upper surface of the peripheral wall 2B, and the light emitter 6 and the light receiver 7 are respectively formed in the element openings 2E and 2F. Installed.
  • a substrate 5 is housed inside the housing 2 so as to be positioned below the two element openings 2E.
  • the substrate 5 is fitted into an attachment portion (not shown) of the housing 2 and is fixed to the housing 2.
  • a light emitter 6 and a light receiver 7 are mounted on the substrate 5.
  • the light emitter 6 is formed by sealing a light emitting element such as a light emitting diode (LED) with a transparent resin, and light having a predetermined wavelength (for example, red light) is applied to the finger F of the user of the pulse wave sensor device 1. Irradiate.
  • the light emitter 6 may be formed using a surface emitting laser (VCSEL) or a resonator type LED as a light emitting element.
  • the light emitter 6 is inserted into the element opening 2E, and is usually aligned with the surface of the peripheral wall 2B of the housing 2, for example, so that the surface of the light emitter 6 contacts the user's finger F. However, it may be arranged so as to protrude from the surface of the peripheral wall 2B, or may be arranged so as to be recessed.
  • the light emitter 6 is driven by a light emitter drive unit 11 described later.
  • the light receiver 7 receives the reflected light from the finger F and converts it into a light detection signal. Output to the detection signal amplifier 12.
  • the light receiver 7 is formed by sealing a light receiving element such as a photodiode (PD) with a transparent resin.
  • the light receiver 7 may be formed using, for example, a phototransistor as a light receiving element.
  • the light receiver 7 is inserted into the element opening 2F, and is usually aligned with the surface of the peripheral wall 2B of the housing 2, for example, so that the surface of the light receiver 7 contacts the user's finger F.
  • it may be arranged so as to protrude from the surface of the peripheral wall 2B, or may be arranged so as to be recessed.
  • the light receiver 7 receives the light emitted from the light emitter 6 and reflected by the user's finger F, converts the received light into a light detection signal, and the light detection signal is detected by the processing circuit 9. Output to the signal amplifier 12.
  • the distance between the light emitter 6 and the light receiver 7 disposed at the last node of the finger F is set within a distance shorter than the length of the last node of the finger F, for example, 4 to 20 mm. Further, between the light emitter 6 and the light receiver 7, in order to prevent the light receiver 7 from directly receiving the light emitted from the light emitter 6, for example, a light shielding portion 8 made of an optically opaque resin material. Is provided.
  • the light receiver 7 is disposed, for example, at the right end of the housing 2 in the left-right direction rather than the light emitter 6. Thereby, when the user brings the finger F into contact with the light emitter 6 and the light receiver 7 along the peripheral wall portion 2B of the housing 2, the light receiver 7 is arranged on the upstream side of the blood flow with respect to the light emitter 6. It is the composition which becomes.
  • the processing circuit 9 is roughly composed of a photoelectric pulse wave signal detection unit 10 and an arithmetic processing unit 14, and is provided inside the housing 2.
  • the processing circuit 9 is switched between driving / stopping according to the on / off state of the switch 4.
  • the photoelectric pulse wave signal detection unit 10 includes a light emitter drive unit 11, a light detection signal amplification unit 12, and a filter unit 13, and generates a photoelectric pulse wave signal of a user in cooperation with the arithmetic processing unit 14.
  • the light emitter driving unit 11 is connected to the light emitter 6 and supplies a driving current for causing the light emitter 6 to emit light.
  • the light detection signal amplifier 12 is connected to the light receiver 7 and performs current-voltage conversion on the light detection signal supplied from the light receiver 7 to amplify the current-voltage converted light detection signal.
  • the filter unit 13 is configured by, for example, a low-pass filter or the like, and is connected to the subsequent stage of the light detection signal amplification unit 12 to remove noise from the light detection signal output from the light detection signal amplification unit 12.
  • the photoelectric pulse wave signal detection unit 10 drives the light emitter 6 using the light emitter drive unit 11, and detects light according to the reflected light from the finger F using the light detection signal amplification unit 12 and the filter unit 13. The signal is output toward the arithmetic processing unit 14.
  • the arithmetic processing unit 14 is, for example, a central processing unit (CPU), a process for controlling the detection light of the light emitter 6, a process for extracting a photoelectric pulse wave signal from the light detection signal, and pulse wave information based on the photoelectric pulse wave signal. The process which produces
  • CPU central processing unit
  • the arithmetic processing unit 14 supplies a control signal for controlling the intensity and timing of the detection light of the light emitter 6 to the light emitter drive unit 11, and sets the light emitter 6 to correspond to this control signal. Make it emit light.
  • the arithmetic processing unit 14 performs a process of extracting a photoelectric pulse wave signal from the light detection signal supplied from the light receiver 7 via the light detection signal amplification unit 12 and the filter unit 13.
  • the arithmetic processing part 14 produces
  • the blood flow inhibition reducing portion 15 is formed integrally with the housing 2 at the right end in the left-right direction (X direction) of the housing 2 adjacent to the light emitter 6 and the light receiver 7.
  • the blood flow inhibition reducing unit 15 is formed from a corner portion 15A that is formed in a substantially triangular prism shape having a substantially triangular cross section by the XZ plane and connects the apexes of the substantially triangular XZ plane cross section that does not contact the housing 2.
  • An upward convex contact portion 15C that inclines gently toward the corner corner 15B that connects the apex on the right side of the substantially triangular shape of the XZ plane cross section that contacts the casing 2, and the casing 2 contacts the casing 2 from the corner corner 15A
  • a step forming portion 15E that steeply inclines toward the corner portion 15D that connects the apexes on the left side of the substantially triangular shape of the XZ plane cross section.
  • the middle node B of the finger F comes into contact with the contact portion 15C.
  • the distal end side of the last node A of the finger F is supported by the surface of the peripheral wall portion 2B, and the middle node B of the finger F is supported by the contact portion 15C.
  • a gap S is formed between the portion near the first joint of the terminal node A of the finger F and the peripheral wall portion 2B, etc. without contacting the surface of the part 2B, and the region of the finger F near the first joint A It can be kept floating.
  • the pressure on the part near the first joint of the terminal node A of the finger F is reduced, and the inhibition of the blood flow of the terminal node A of the finger F is suppressed.
  • the last node A of the finger F is a part from the first joint of the finger F to the fingertip
  • the middle node B of the finger F is a part from the first joint to the second joint of the finger F.
  • the portion closer to the first joint of the terminal node A of the finger F than the central part of the terminal node A of the finger F or the middle node B of the finger F is good also as a structure which the site
  • the blood flow inhibition reducing portion 15 may be formed with a mechanism movable in the left-right direction with respect to the housing 2. Moreover, it is good also as a structure which the blood flow inhibition reduction part 15 protrudes from the housing
  • the fingertip positioning portion 16 is formed by a protrusion protruding from the surface of the peripheral wall portion 2B at the surface position of the peripheral wall portion 2B where the tip of the terminal node A of the finger F of the user of the pulse wave sensor device 1 contacts.
  • the distance between the fingertip positioning unit 16 and the blood flow inhibition reducing unit 15 is such that the distal end side of the terminal node A of the finger F is supported by the surface of the peripheral wall 2B, and the middle node B of the finger F is supported by the contact unit 15C. It is set based on the length dimension of the last clause A of the index finger F of a general human body.
  • the fingertip positioning unit 16 restricts the fingertip from being greatly displaced on the left side in the left-right direction, and prevents the blood flow inhibition reducing unit 15 from being unnecessarily separated from the vicinity of the first joint. .
  • the pulse wave sensor device 1 according to the first embodiment of the present invention has the above-described configuration, and the operation thereof will be described next.
  • the switch 4 is turned on.
  • a control signal is supplied from the arithmetic processing unit 14 toward the light emitter drive unit 11, and the light emitter 6 emits detection light according to the control signal.
  • This detection light is reflected by the terminal node A of the user's finger F, and this reflected light is received by the light receiver 7.
  • the light receiver 7 outputs a light detection signal corresponding to the reflected light.
  • This photodetection signal is amplified after being subjected to current-voltage conversion by the photodetection signal amplifying unit 12, and after noise is removed by the filter unit 13, the photodetection signal is supplied to the arithmetic processing unit 14.
  • the arithmetic processing unit 14 extracts a photoelectric pulse wave signal corresponding to the detection light of the light emitter 6 from the light detection signal supplied from the filter unit 13. Then, based on the extracted photoelectric pulse wave signal, the arithmetic processing unit 14 generates pulse wave information such as a pulse wave waveform, a pulse rate, an oxygen saturation, and a vascular stiffness. The pulse wave information is displayed on the display device 3.
  • the finger F when any part of the finger F is pressed, the blood flow in the terminal node A is not uniformly inhibited, and the influence on the blood flow differs depending on the part of the finger F to be pressed. That is, the finger F has a part where the blood flow is easily inhibited and a part where the blood flow is difficult to be inhibited.
  • the housing 2 in the present embodiment is provided with a blood flow inhibition reducing portion 15 protruding from the surface of the peripheral wall portion 2 ⁇ / b> B so as to be positioned around the light emitter 6 and the light receiver 7.
  • the experimental blood flow inhibition reducing unit 17 shown in FIG. 9 is provided in the housing 2, and the examination results on the effect of the shape and position of the blood flow inhibition reducing unit 17 on the blood flow will be described.
  • Table 1 shows that the distance d between the corner 17A of the blood flow inhibition reducing portion 17 and the first joint of the finger F is changed in the range of ⁇ 2 mm to +8 mm, and the contact portion 17B from the surface of the housing 2 is changed.
  • the measurement result of the pressing force of the finger F when the pulse wave cannot be measured when the projecting dimension t is changed in the range of 0 mm to 8 mm is shown.
  • the distance dimension d is based on the position of the first joint of the finger F, and the corner portion 17A of the blood flow inhibition reducing unit 17 is on the right side (second joint side) of the position of the first joint of the finger F.
  • the case is defined as a positive distance dimension
  • the case where the corner 17A of the blood flow inhibition reducing unit 17 is on the left side (fingertip side) of the first joint of the finger F is defined as a negative distance dimension.
  • the protruding dimension t is based on the surface of the housing 2.
  • the portion of the finger F closer to the first joint A Therefore, even when the pressing force of the finger F is applied, the portion near the first joint in the region of the terminal node A of the finger F is not strongly pressed by the corner portion 17A. For this reason, even if the pressing force of the finger F is large, the blood flow is hardly inhibited.
  • the corner portion 17A of the blood flow inhibition reducing unit 17 is arranged at a position close to the first joint in the region of the middle joint B of the finger F (for example, when the distance dimension d is 2 mm), the blood The effect of reducing the flow inhibition is increased.
  • the step forming portion 17C becomes small and the pressing force of the finger F that cannot measure the pulse wave becomes small.
  • the step between the corner 17A and the surface of the housing 2 is insufficient, and the portion of the finger F near the first joint A directly contacts the surface of the housing 2; The part near the first joint in the region of the terminal node A of the finger F is strongly pressed by the pressure. For this reason, even if the pressing force of the finger F is small, the blood flow is easily inhibited.
  • the step forming portion 17C is increased and the pressing force of the finger F that cannot measure the pulse wave is increased.
  • a portion near the first joint of the terminal node A floats due to a step between the corner portion 17A and the surface of the housing 2, so that the first joint in the region of the terminal node A of the finger F by the pressing force of the finger F The close part is not strongly pressed. For this reason, even if the pressing force of the finger F is large, the blood flow is hardly inhibited.
  • the terminal A of the finger F is likely to be separated from the light emitter 6 and the light receiver 7, and external disturbance light from outside. It becomes easy to be affected.
  • the distance dimension d from the first joint of the finger F to the blood flow inhibition reducing unit 17 is preferably set to a value of, for example, about 0 to 6 mm, and preferably about 1 to 3 mm.
  • the protrusion dimension t of the blood flow inhibition reducing portion 17 is preferably set to a value of, for example, about 2 to 8 mm, and preferably to a value of about 3 to 5 mm.
  • the protruding dimension t and the arrangement of the blood flow inhibition reducing unit 15 are set with reference to such values.
  • the above values are examples.
  • the blood flow inhibition reducing unit 15 is provided in the housing 2, the user connects the terminal A of the finger F with the light emitter 6 and the light receiver. 7, the middle node B of the finger F contacts the contact part 15 ⁇ / b> C of the blood flow inhibition reducing unit 15. Accordingly, the distal end side of the terminal node A of the finger F and the middle node B of the finger F are supported by the casing 2 and the blood flow inhibition reducing unit 15 around the light emitter 6 and the light receiver 7, respectively. In a region near the first joint of the last node A of the finger F located between the two, the pressure due to the pressing force of the finger F can be reduced.
  • a step is formed by the step forming portion 15E between the surface of the peripheral wall portion 2B of the housing 2 that becomes the contact surface of the light emitter 6 and the contact portion 15C of the blood flow inhibition reducing portion 15, This step can reduce the pressure acting on the portion of the finger F closer to the first joint of the terminal node A.
  • the fingertip positioning unit 16 that comes into contact with the fingertip is provided in the housing 2, the position of the fingertip can be fixed and the blood flow inhibition reducing unit 15 and the middle node B of the finger F can be positioned.
  • the blood flow inhibition reducing unit 15 can be reliably brought into contact with the middle node B of the finger F, and the pressure on the portion of the terminal node A near the first joint can be reliably reduced.
  • the display device 3 is provided in the housing 2, by visually observing the display device 3, for example, pulse wave information such as a pulse wave waveform can be confirmed. Further, since the casing 2 is provided with the processing circuit 9 and the display device 3 in addition to the light emitter 6 and the light receiver 7, the pulse wave can be measured and the pulse wave information can be displayed by these, and the portable pulse can be displayed.
  • the wave sensor device 1 can be configured.
  • the pulse wave is measured while holding the housing 2, so that the pressing force of the finger F tends to be strong.
  • the portable pulse wave sensor device 1 since the terminal node A of the finger F is brought into contact with the light emitter 6 or the like with the second joint of the finger F folded, the measurement is performed with the finger F extended. In comparison, the pressing force of the finger F tends to be high. For this reason, for example, as in Patent Documents 2 and 3, when the light emitting portion is provided so as to protrude, a portion close to the first joint of the terminal node A of the finger F is also pressed by a strong pressing force, and a pulse wave is detected. It may not be possible.
  • the blood flow inhibition reducing portion 15 since the blood flow inhibition reducing portion 15 is provided in the housing 2, the blood flow inhibition reducing portion 15 can suppress the compression of the portion near the first joint of the terminal node A, Even when the pressing force of the finger F increases, the pulse wave can be easily detected.
  • FIG. 11 shows a second embodiment of the present invention.
  • the feature of this embodiment is that a mechanism for adjusting the contact position with the middle joint of the finger is provided in the blood flow inhibition reducing portion.
  • the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.
  • the pulse wave sensor device 21 includes a housing 2, a display device 3, a light emitter 6, a light receiver 7, and the like, almost the same as the pulse wave sensor device 1 according to the first embodiment. Further, a blood flow inhibition reducing portion 22 is provided on the surface of the peripheral wall portion 2B of the housing 2 so as to be positioned at the right end portion of the housing 2 relative to the light emitter 6 and the light receiver 7, and the light emitter 6 and the light receiver. A fingertip positioning portion 16 is provided at a position on the opposite side in the left-right direction across 7.
  • the blood flow inhibition reducing portion 22 is formed in substantially the same manner as the blood flow inhibition reducing portion 15 according to the first embodiment, and includes a corner portion 22A, a contact portion 22B, and a step forming portion 22C.
  • the blood flow inhibition reducing unit 22 is different from the blood flow inhibition reducing unit 15 according to the first embodiment in that the length dimension in the left-right direction can be changed. That is, the corner portion 22A and the step forming portion 22C can be displaced in the left-right direction, and the distance dimension between the blood flow inhibition reducing portion 22, the light emitter 6 and the light receiver 7 can be changed.
  • the entire blood flow inhibition reducing portion 22 is provided so as to be slidable in the left-right direction.
  • the corner portion 22A and the step forming portion 22C of the blood flow inhibition reducing portion 22 are provided so as to be displaceable with respect to the light emitter 6 and the light receiver 7.
  • the length dimension is large, the distance dimension between the light emitter 6 and the like and the blood flow inhibition reducing unit 22 is increased, and when the length dimension of the terminal node A of the finger F is small, the light emitter 6 and the blood flow are increased.
  • the distance between the inhibition reducing unit 22 can be reduced.
  • the blood flow inhibition reducing unit 22 has the It is possible to allow a difference in the length dimension of the terminal node A of the finger F for each user without touching a portion closer to one joint.
  • the distance between the light emitters 6 and 7 and the blood flow inhibition reducing unit 22 can be changed.
  • the present invention is not limited to this.
  • the distance dimension between the fingertip positioning unit 32 and the fingertip positioning unit 32 may be changed.
  • the surface of the housing 2 is positioned around the light emitter 6 and the light receiver 7, for example, schematically showing the shape of the finger.
  • the guide mark 42 shown is preferably provided.
  • FIG. 14 shows a third embodiment of the present invention.
  • a feature of the present embodiment is that a concave portion is formed on the surface of the housing, a light emitter and a light receiver are disposed on the bottom surface of the concave portion, and a step between the bottom surface of the concave portion and the surface of the housing is provided.
  • the blood flow inhibition reducing part and the fingertip positioning part are formed.
  • the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.
  • the pulse wave sensor device 51 includes a housing 2, a display device 3, a light emitter 6, a light receiver 7, and the like, almost the same as the pulse wave sensor device 1 according to the first embodiment. Further, a recessed portion 52 that is recessed in the height direction is formed on the surface of the peripheral wall portion 2B of the housing 2. The recessed portion 52 has a length similar to that of the terminal node A of the finger F in the left-right direction, and the light emitter 6 and the light receiver 7 are attached to the bottom surface 52A. Moreover, the depth dimension of the recessed part 52 is set to the same value as the protrusion dimension t of the blood flow inhibition reducing part 15 according to the first embodiment, for example.
  • the blood flow inhibition reducing portion 53 is provided in the housing 2 in the vicinity of the light emitter 6 and the light receiver 7, and is formed by a step portion on the right side of the recessed portion 52. For this reason, the blood flow inhibition reducing unit 53 is located, for example, at the right end in the left-right direction of the housing 2 rather than the light emitter 6 and the light receiver 7.
  • the blood flow inhibition reducing portion 53 includes a corner portion 53A located at a boundary portion with the recessed portion 52, a contact portion 53B that extends from the corner portion 53A toward the right side of the housing 2 and contacts the middle node B, A step forming portion 53C extending from the corner portion 53A toward the light emitter 6 and the light receiver 7 is provided.
  • the step forming portion 53 ⁇ / b> C forms a step between the bottom surface 52 ⁇ / b> A serving as a contact surface with the light emitter 6 and the light receiver 7.
  • the fingertip positioning portion 54 is provided in the housing 2 in the vicinity of the light emitter 6 and the light receiver 7, and is formed by a step portion on the left side of the recessed portion 52. For this reason, the fingertip positioning portion 54 is disposed on the distal end side of the terminal node A with respect to the light emitter 6 and the light receiver 7. That is, the fingertip positioning unit 54 is disposed at a position opposite to the blood flow inhibition reducing unit 53 with the light emitter 6 and the light receiver 7 interposed therebetween in the left-right direction.
  • the fingertip contacts the inclined surface in the recessed portion 52 of the fingertip positioning unit 54, and the middle node B flows into the bloodstream. It contacts the contact part 53B of the inhibition reducing part 53.
  • FIG. 15 shows a fourth embodiment of the present invention.
  • the blood flow inhibition reducing portion includes a contact portion that comes into contact with the middle node of the finger, and a recess portion that is located between the contact portion and the light emitter and the light receiver. It is to have done.
  • the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.
  • the pulse wave sensor device 61 includes a housing 2, a display device 3, a light emitter 6, a light receiver 7, and the like, almost the same as the pulse wave sensor device 1 according to the first embodiment. Further, a blood flow inhibition reducing portion 62 is provided on the surface of the peripheral wall portion 2B of the housing 2 at a position closer to the right end of the housing 2 than the light emitter 6 and the light receiver 7, and the light emitter 6 and the light receiver. A fingertip positioning portion 16 is provided at a position on the opposite side in the left-right direction across 7.
  • the blood flow inhibition reducing unit 62 is positioned between the contact unit 62A formed of a flat surface that extends toward the right side of the housing 2 and contacts the middle node B, and between the contact unit 62A, the light emitter 6 and the light receiver 7. And a recess 62B that is recessed from the periphery.
  • the contact portion 62A is disposed at substantially the same height as the surface of the peripheral wall portion 2B of the housing 2 in which the light emitter 6 and the light receiver 7 are provided.
  • the recess 62B is formed in a uniform groove shape in the depth direction (finger width direction), for example, and is a peripheral wall located around the light emitter 6 and the light receiver 7 and in contact with the terminal node A of the finger F A discontinuous step is formed in the left-right direction between the surface of the portion 2B and the contact portion 62A where the middle node B of the finger F contacts.
  • the portion of the terminal node A near the first joint is The surface of the peripheral wall 2B and the bottom surface of the recess 62B are not in contact with each other, and the gap S is formed.
  • the blood flow inhibition reducing unit 62 reduces the pressing force on the portion of the terminal node A closer to the first joint and suppresses the blood flow on the terminal node A side from being inhibited.
  • the fourth embodiment can provide the same operational effects as the first embodiment.
  • the contact part 62A of the blood flow inhibition reducing part 62 is disposed at substantially the same height as the surface of the peripheral wall part 2B of the housing 2 provided with the light emitter 6 and the like. However, you may arrange
  • the light emitter 6, the light receiver 7, the blood flow inhibition reducing portions 15, 22, 53, and 62 are provided only on the right side of the housing 2.
  • the present invention is not limited to this.
  • a light emitter 6 and a light receiver 7 are provided on the left side of the housing 2 as in the pulse wave sensor device 71 according to the third modification shown in FIG. It is good also as a structure which provides the blood flow inhibition reduction part 72 and the fingertip positioning part 73 substantially the same as these in the position bilaterally symmetrical with the inhibition reduction part 15 and the fingertip positioning part 16.
  • the blood flow inhibition reducing portions 15, 22, 53, 62 and the fingertip positioning portions 16, 54 are formed in a uniform shape with respect to the depth direction (Y direction).
  • the present invention is not limited to this.
  • the pulse wave sensor device 81 according to the fourth modification shown in FIG. The grooves 84 and 85 may be provided.
  • the light emitter 6 is disposed on the fingertip side which is the downstream side of the blood flow
  • the light receiver 7 is disposed on the first joint side which is the upstream side of the blood flow. It was.
  • the present invention is not limited to this, and the light emitter 6 may be disposed on the upstream side of the blood flow, and the light receiver 7 may be disposed on the downstream side of the blood flow.
  • FIG. 18 shows a fifth embodiment of the present invention.
  • the casing is provided with a light emitter and a light receiver at positions opposite to each other across the finger, and a pulse wave is detected using transmitted light transmitted through the finger.
  • the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.
  • the pulse wave sensor device 91 includes a housing 92, a light emitter 93, a light receiver 94, a processing circuit 96, and the like.
  • the casing 92 includes a casing main body 92A having a flat surface and a light shielding cover 92B provided on the surface of the casing main body 92A and shaped like a bottomed cylinder.
  • the opening of the light shielding cover 92B serves as an insertion opening when the user inserts the finger F.
  • the light shielding cover 92B is formed in a structure in which the height of the light shielding cover 92B is narrowed with respect to the insertion direction of the finger F.
  • the light emitter 93 is configured in substantially the same manner as the light emitter 6 according to the first embodiment, and is provided in the housing main body 92A with its light emitting surface side exposed on the surface of the housing main body 92A.
  • the light emitter 93 contacts the terminal node A of the user's finger F and irradiates the finger F with light serving as detection light.
  • the light receiver 94 is configured in substantially the same manner as the light receiver 7 according to the first embodiment, and is provided on the inner wall surface of the light shielding cover 92B with the light receiving surface side facing the light emitter 93 side.
  • the light receiver 94 is provided at a position opposite to the light emitter 93 with the user's finger F interposed therebetween in the vertical direction. Thereby, the light receiver 94 receives the transmitted light transmitted through the finger F when the light emitter 93 irradiates the user's finger F with detection light.
  • the housing main body 92A is located on the right side in the left-right direction (the front side in the insertion direction of the finger F) of the light emitter 93 and the light receiver 94 and is in contact with the middle node B of the finger F. Is provided. Further, on the back side of the light shielding cover 92B, a fingertip positioning portion 95 that is located on the left side in the left-right direction (the back side in the insertion direction of the finger F) of the light emitter 93 and the light receiver 94 and is in contact with the fingertip of the finger F is provided. It has been.
  • the processing circuit 96 is configured in substantially the same manner as the processing circuit 9 according to the first embodiment, and its input side is connected to the light emitter 93 and the light receiver 94 and its output side is connected to, for example, a display device (not shown). ing.
  • the processing circuit 96 supplies a driving current to the light emitter 93 to emit detection light, and when the light detection signal corresponding to the transmitted light of the finger F is input from the light receiver 94, the light detection signal.
  • the photoelectric pulse wave signal is extracted using.
  • the processing circuit 96 generates various pulse wave information from the photoelectric pulse wave signal and displays it using a display device.
  • the fifth embodiment can provide the same operational effects as the first embodiment.
  • the single light emitters 6 and 93 are used. However, for example, a plurality of light emitters that emit detection lights having different wavelength ranges may be provided. Good.
  • FIG. 19 shows a sixth embodiment of the present invention.
  • the feature of the present embodiment is that an ultrasonic transmitter and receiver are provided in the casing, and the processing circuit is a pulse wave signal based on the ultrasonic wave transmitted by the transmitter and the ultrasonic wave received by the receiver. It is in the structure which produces
  • the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.
  • the pulse wave sensor device 101 includes a housing 2, a transmitter 102, a receiver 103, a processing circuit 104, and the like.
  • the transmitter 102 and the receiver 103 are provided in the housing 2 in place of the light emitter 6 and the light receiver 7 according to the first embodiment, for example.
  • the transmitter 102 is provided, for example, at substantially the same position as the light emitter 6 according to the first embodiment, the last node A of the user's finger F comes into contact, and the finger F is irradiated with ultrasonic waves having a constant frequency.
  • the receiver 103 is provided at substantially the same position as the light receiver 7 according to the first embodiment, for example.
  • the receiver 103 receives the ultrasonic wave reflected by the finger F when the transmitter 102 irradiates the user's finger F with ultrasonic waves.
  • the transmitter 102 is arranged on the fingertip side which is the downstream side of the blood flow, and the receiver 103 is arranged on the first joint side which is the upstream side of the blood flow.
  • the present invention is not limited to this, and the transmitter 102 may be arranged on the upstream side of the blood flow, and the receiver 103 may be arranged on the downstream side of the blood flow.
  • the housing 2 is provided with a blood flow inhibition reducing unit 15 that is located on the right side in the left-right direction (the base side of the finger F) of the transmitter 102 and the receiver 103 and contacts the middle node B of the finger F.
  • a fingertip positioning unit 16 that is located on the left side (fingertip side of the finger F) of the transmitter 102 and the receiver 103 and is in contact with the fingertip of the finger F is provided.
  • the processing circuit 104 supplies a driving voltage and current to the transmitter 102 and generates a pulse wave signal based on the detection signal of the receiver 103. More specifically, when the transmitter 102 irradiates the finger F with an ultrasonic wave having a constant frequency, a reflected wave from the finger F has a Doppler effect due to blood flow. For this reason, the processing circuit 104 generates a pulse wave signal corresponding to, for example, the average blood flow velocity based on the spectrum of the Doppler frequency and the Doppler displacement frequency. Further, the processing circuit 104 generates various pulse wave information based on the pulse wave signal, and displays it using a display device (not shown).
  • the blood flow inhibition reducing unit 15 according to the first embodiment is used.
  • the blood flow inhibition reducing unit 22 according to the second to fourth embodiments is used.
  • 53, 62 and the fingertip positioning portion 54 may be used.
  • the blood flow inhibition reducing units 95 and 16 are used.
  • the fingertip positioning unit 54 according to the third embodiment may be used.
  • the pulse wave sensor devices 1, 21, 31, 41, 51, 61, 71, 81, 91, 101 have the processing circuits 9, 96, 104 and the display device in the casings 2, 92. 3 is provided as an example to constitute a portable device, but the present invention is not limited to this.
  • a pulse wave sensor device is detected such as a detection section having components necessary for detecting a light detection signal, such as a light emitter 6 and a light receiver 7, and processing circuits 9, 96, 104, and the like.
  • Signal processing is performed on the light detection signal detected in the section, and it is separated into an arithmetic processing section having components necessary for performing processing for generating pulse wave information, and the detection section is formed as a portable device
  • the arithmetic processing section may be formed as a desktop type device, for example.
  • the detection section and the arithmetic processing section may be provided, for example, on an inspection table as a housing, and the whole may be formed as a desktop device.
  • each said embodiment it was set as the structure which detects a pulse wave with a user's index finger F, However, It is good also as a structure which detects a pulse wave with another finger like a middle finger, a ring finger, etc.

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Abstract

Disclosed is a pulse wave sensor device with a light emitter (6) and a light receiver (7) provided on the surface of a peripheral wall section (2B) of a case (2). On the surface of the peripheral wall section (2B) of the case (2), a blood flow impedance reduction section (15) is provided on the right hand side of the light emitter (6) and the light receiver (7) and a fingertip positioning section (16) is provided to the left of the light emitter (6) and the light receiver (7). When a user brings the distal phalange (A) of a finger (F) into contact with the light emitter (6) and the light receiver (7), the middle phalange (B) of the finger (F) comes into contact with the contact section (15C) of the blood flow impedance reduction section (15). A difference in level arises between a section on the case (2) at the periphery of the light emitter (6) and light receiver (7) and the contact section (15C), reducing the pressure on the section of the distal phalange (A) of the finger (F) close to the first joint.

Description

脈波センサ装置Pulse wave sensor device
　本発明は、光または超音波を指に照射して脈波を検出する脈波センサ装置に関する。 The present invention relates to a pulse wave sensor device that detects a pulse wave by irradiating a finger with light or ultrasonic waves.
　一般に、指に光を照射する発光器と、指が反射した光を受光する受光器とを備え、発光器が照射した光と受光器が受光した光との間の光量変化に基づいて脈波を検出する脈波センサ装置が知られている（例えば、特許文献１～３参照）。 In general, it has a light emitter that irradiates light on a finger and a light receiver that receives light reflected by the finger, and a pulse wave based on a change in light quantity between the light irradiated by the light emitter and the light received by the light receiver There is known a pulse wave sensor device for detecting (see, for example, Patent Documents 1 to 3).
　指を発光器や受光器に強く押付けると、指が圧迫されて動脈血流が阻害されるので脈波信号が弱くなり、脈波が検出できなくなる。この点を考慮して、特許文献１には、指の押圧力を検出する押圧力検出手段を設け、押圧力が高いときに利用者に告知する機能を付加する構成が開示されている。 If the finger is pressed strongly against the light emitter or light receiver, the finger is compressed and the arterial blood flow is inhibited, so the pulse wave signal becomes weak and the pulse wave cannot be detected. In consideration of this point, Patent Document 1 discloses a configuration in which a pressing force detection unit that detects a pressing force of a finger is provided and a function of notifying a user when the pressing force is high is added.
　また、特許文献２，３には、発光器を周囲に比べて突出して設け、発光器を指に確実に接触させて脈波を検出し易くする構成が開示されている。 Patent Documents 2 and 3 disclose a configuration in which a light emitter is provided so as to protrude from the surroundings, and the pulse wave is easily detected by reliably bringing the light emitter into contact with a finger.
国際公開第９４／１５５２５号パンフレットInternational Publication No. 94/15525 Pamphlet 特開２００４－４６７号公報JP 2004-467 A 特開２００８－４８９８７号公報JP 2008-48987 A
　特許文献１による脈波センサ装置では、指の押圧力が強過ぎて測定ができない旨を利用者に告知する機能を備えている。しかし、この構成では、指の押圧力が強くて測定ができないときでも、その旨を告知するだけである。このため、一定時間測定を行うためには、指の押圧力を弱い状態に保持して安定させる必要があり、利用者に負担を強いるという問題がある。 The pulse wave sensor device according to Patent Document 1 has a function of notifying the user that measurement cannot be performed because the finger pressing force is too strong. However, with this configuration, even when the finger pressing force is strong and measurement is not possible, only that fact is notified. For this reason, in order to perform measurement for a certain period of time, it is necessary to stabilize the finger pressing force in a weak state, which causes a problem that a burden is imposed on the user.
　また、特許文献２，３には、発光器を周囲に比べて突出して設け、発光器を指に確実に接触させる構成が開示されている。しかし、これらは指の押圧力を低下させるものではないから、指の押圧力が強過ぎたときに脈波が検出できないことに変わりなく、前述と同様な問題がある。 Further, Patent Documents 2 and 3 disclose a configuration in which a light emitter is provided so as to protrude from the surroundings and the light emitter is reliably brought into contact with a finger. However, since these do not reduce the finger pressing force, the pulse wave cannot be detected when the finger pressing force is too strong, and there is the same problem as described above.
　本発明は上述の問題に鑑みなされたものであり、本発明の目的は、血流の阻害を低減して脈波を容易に検出することができる脈波センサ装置を提供することにある。 The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a pulse wave sensor device that can easily detect a pulse wave by reducing the inhibition of blood flow.
　（１）．上記課題を解決するために、本発明は、筐体と、該筐体に設けられた発光器と、前記筐体に設けられた受光器とを備え、指の末節を用いて脈波を検出する脈波センサ装置において、前記筐体における前記指の末節が接触する位置に前記発光器および前記受光器を配設すると共に、前記指の末節を前記発光器および前記受光器に接触させたときに、前記指の中節と接触する血流阻害低減部を前記筐体に設け、該血流阻害低減部における前記指の中節が接触する接触部と、前記指の末節が接触する前記筐体との間に段差を形成して、前記指の末節における第１関節部位およびその周辺に作用する圧迫を小さくし、前記指の末節における血流の阻害を低減することを特徴としている。 (1). In order to solve the above-described problems, the present invention includes a housing, a light emitter provided in the housing, and a light receiver provided in the housing, and detects a pulse wave using a terminal node of a finger. In the pulse wave sensor device, the light emitter and the light receiver are disposed at a position where the finger's terminal node contacts the housing, and the finger's terminal node is brought into contact with the light emitter and the light receiver. The blood flow inhibition reducing portion that contacts the middle node of the finger is provided in the housing, and the housing portion in contact with the middle node of the finger in the blood flow inhibition reducing portion and the housing where the terminal node of the finger contacts A step is formed between the finger and the body to reduce the pressure acting on and around the first joint portion of the finger at the end of the finger, thereby reducing blood flow inhibition at the end of the finger.
　指先を用いて脈波を検出する脈波センサ装置では、指を強く圧迫すると、血流が阻害されて脈波の検出ができなくなる。ここで、指の末節の血流に対する影響は、圧迫される指の部位に応じて異なる。本発明者が鋭意検討した結果、指の末節の第１関節寄りの部位が圧迫された場合には、指の末節の血流が阻害され易く、小さい押圧力が加わっても脈波の検出ができなくなることを見出した。 In a pulse wave sensor device that detects a pulse wave using a fingertip, if the finger is strongly pressed, the blood flow is inhibited and the pulse wave cannot be detected. Here, the influence of the finger on the blood flow at the end of the finger varies depending on the part of the finger to be pressed. As a result of intensive studies by the present inventor, when a portion near the first joint of the finger's end node is compressed, blood flow in the finger's end node is likely to be inhibited, and pulse waves can be detected even when a small pressing force is applied. I found it impossible.
　本発明では、筐体に血流阻害低減部を設けたから、脈波センサ装置の利用者が指の末節を発光器および受光器に接触させると、指の中節が血流阻害低減部に接触する。これにより、指の末節の先端側と指の中節とが、発光器および受光器の周囲の筐体と血流阻害低減部とによってそれぞれ支持されるから、これらの間に位置する指の末節の第１関節寄りの部位に対する押圧力を低減することができる。このため、指の末節の第１関節寄りの部位が圧迫されるのを防止することができ、発光器および受光器に指を強く押付けたときでも、末節の血流が阻害されることがなくなる。この結果、押圧力が弱い状態に保持して安定させる必要がないから、利用者の負担を軽減して、脈波を容易に検出することができる。 In the present invention, since the blood flow inhibition reducing portion is provided in the housing, when the user of the pulse wave sensor device makes the terminal node of the finger contact the light emitter and the light receiver, the middle node of the finger contacts the blood flow inhibition reducing portion. To do. As a result, the distal end of the finger and the middle of the finger are supported by the housing around the light emitter and the light receiver and the blood flow inhibition reducing unit, respectively. It is possible to reduce the pressing force on the portion closer to the first joint. For this reason, it can prevent that the site | part close | similar to the 1st joint of the terminal part of a finger | toe can be prevented, and even when a finger | toe is strongly pressed against a light-emitting device and a light receiver, the blood flow of a terminal node is not inhibited. . As a result, since it is not necessary to stabilize the pressing force in a weak state, it is possible to reduce the burden on the user and easily detect the pulse wave.
　（２）．本発明は、筐体と、該筐体に設けられた超音波の送信器と、前記筐体に設けられた超音波の受信器とを備え、指の末節を用いて脈波を検出する脈波センサ装置において、前記筐体における前記指の末節が接触する位置に前記送信器および前記受信器を配設すると共に、前記指の末節を前記送信器および前記受信器に接触させたときに、前記指の中節と接触する血流阻害低減部を前記筐体に設け、該血流阻害低減部における前記指の中節が接触する接触部と、前記指の末節が接触する前記筐体との間に段差を形成して、前記指の末節における第１関節部位およびその周辺に作用する圧迫を小さくし、前記指の末節における血流の阻害を低減することを特徴としている。 (2). The present invention includes a casing, an ultrasonic transmitter provided in the casing, and an ultrasonic receiver provided in the casing, and detects a pulse wave using a terminal node of a finger. In the wave sensor device, when the transmitter and the receiver are disposed at a position where the terminal of the finger contacts the housing, and the terminal of the finger is brought into contact with the transmitter and the receiver, A blood flow inhibition reducing portion that contacts the middle node of the finger is provided in the housing, a contact portion that contacts the middle node of the finger in the blood flow inhibition reducing portion, and the housing that the terminal node of the finger contacts A step is formed between the first joint portion and the peripheral portion of the finger to reduce the pressure acting on the periphery of the first joint portion and the periphery thereof, thereby reducing the inhibition of blood flow at the distal node of the finger.
　本発明では、筐体に血流阻害低減部を設けたから、脈波センサ装置の利用者が指の末節を送信器および受信器に接触させると、指の中節が血流阻害低減部に接触する。これにより、指の末節の先端側と指の中節とが、送信器および受信器の周囲の筐体と血流阻害低減部とによってそれぞれ支持されるから、これらの間に位置する指の末節の第１関節寄りの部位に対する押圧力を低減することができる。このため、指の末節の第１関節寄りの部位が圧迫されるのを防止することができ、送信器および受信器に指を強く押付けたときでも、末節の血流が阻害されることがなくなり、脈波を容易に検出することができる。 In the present invention, since the blood flow inhibition reducing unit is provided in the housing, when the user of the pulse wave sensor device contacts the terminal node of the finger with the transmitter and the receiver, the middle node of the finger contacts the blood flow inhibition reducing unit. To do. As a result, the distal end side of the finger terminal and the middle node of the finger are respectively supported by the casing around the transmitter and the receiver and the blood flow inhibition reducing unit. It is possible to reduce the pressing force on the portion closer to the first joint. For this reason, it can prevent that the site | part close | similar to the 1st joint of the terminal part of a finger | toe is prevented, and even when a finger is strongly pressed against a transmitter and a receiver, the blood flow of the terminal part is not hindered. The pulse wave can be easily detected.
　（３）．本発明では、前記血流阻害低減部によって形成された段差により、前記指の末節における第１関節寄りの領域と、前記筐体の表面との間に隙間を形成している。 (3). In the present invention, a gap is formed between the region near the first joint at the terminal node of the finger and the surface of the housing by the step formed by the blood flow inhibition reducing unit.
　本発明によれば、血流阻害低減部によって形成された段差により、指の末節における第１関節寄りの領域と、筐体の表面との間に隙間を形成したから、この隙間によって指の末節における第１関節寄りの領域に対する押圧力を低減することができ、血流の阻害を低減することができる。 According to the present invention, a gap is formed between the region near the first joint in the terminal joint of the finger and the surface of the housing by the step formed by the blood flow inhibition reducing unit. In this case, it is possible to reduce the pressing force with respect to the region closer to the first joint, and it is possible to reduce blood flow inhibition.
　（４）．本発明では、前記指の先端が接触する前記筐体の表面位置に指先位置決め部を設ける構成としている。 (4). In this invention, it is set as the structure which provides a fingertip positioning part in the surface position of the said housing | casing which the front-end | tip of the said finger contacts.
　本発明によれば、指の先端が接触する筐体の表面位置に指先位置決め部を設けたから、指先の位置を固定して血流阻害低減部と指の中節との位置決めを行うことができ、血流阻害低減部を指の中節に確実に接触させることができる。 According to the present invention, since the fingertip positioning part is provided at the surface position of the housing that contacts the tip of the finger, the position of the fingertip can be fixed and the blood flow inhibition reducing part and the middle joint of the finger can be positioned. The blood flow inhibition reducing portion can be reliably brought into contact with the middle segment of the finger.
　（５）．本発明では、前記血流阻害低減部には、前記指の中節との接触位置を調整する機構を設ける構成としている。 (5). In the present invention, the blood flow inhibition reducing portion is provided with a mechanism for adjusting the contact position with the middle joint of the finger.
　本発明によれば、血流阻害低減部には指の中節との接触位置を調整する機構を設けたから、例えば指の末節の長さ寸法に応じて指の中節との接触位置を調整することができる。これにより、指の末節の長さ寸法が利用者毎に異なる場合でも、このような寸法のばらつきを許容して、血流阻害低減部の接触部を指の中節に接触させることができる。 According to the present invention, since the mechanism for adjusting the contact position with the middle segment of the finger is provided in the blood flow inhibition reducing unit, for example, the contact position with the middle segment of the finger is adjusted according to the length dimension of the last segment of the finger. can do. Thereby, even when the length dimension of the terminal node of a finger changes for every user, the variation of such a dimension is permitted and the contact part of a blood flow inhibition reduction part can be made to contact a middle part of a finger.
本発明の第１の実施の形態による脈波センサ装置を示す斜視図である。1 is a perspective view showing a pulse wave sensor device according to a first embodiment of the present invention. 利用者が脈波の測定を行っている状態の脈波センサ装置を示す正面図である。It is a front view which shows the pulse wave sensor apparatus of the state which the user is measuring the pulse wave. 図１中の脈波センサ装置を示す平面図である。It is a top view which shows the pulse wave sensor apparatus in FIG. 図１中の脈波センサ装置の右側を拡大して示す斜視図である。It is a perspective view which expands and shows the right side of the pulse wave sensor apparatus in FIG. 図４中の発光器、受光器、血流阻害低減部、指先位置決め部等を拡大して示す斜視図である。It is a perspective view which expands and shows the light-emitting device, light receiver, blood flow inhibition reduction part, fingertip positioning part, etc. in FIG. 図５中の発光器および受光器に利用者の人差し指の末節を接触させた状態を示す斜視図である。It is a perspective view which shows the state which made the last node of a user's index finger contact the light-emitting device and light receiver in FIG. 脈波センサ装置の発光器および受光器等を図３中の矢示VII－VII方向からみた断面図である。FIG. 4 is a cross-sectional view of the light emitting device, the light receiving device, and the like of the pulse wave sensor device as viewed from the direction of arrows VII-VII in FIG. 3. 第１の実施の形態による脈波センサ装置の電気的構成を示すブロック図である。It is a block diagram which shows the electrical constitution of the pulse wave sensor apparatus by 1st Embodiment. 血流阻害低減部と指の末節および中節との関係を示す説明図である。It is explanatory drawing which shows the relationship between a blood-flow inhibition reduction part and the last node and middle node of a finger | toe. 光電脈波信号の時間変化を示す特性線図である。It is a characteristic diagram which shows the time change of a photoelectric pulse wave signal. 第２の実施の形態による脈波センサ装置を示す図５と同様な位置の斜視図である。It is a perspective view of the same position as Drawing 5 showing the pulse wave sensor device by a 2nd embodiment. 第１の変形例による脈波センサ装置を示す図５と同様な位置の斜視図である。It is a perspective view of the same position as Drawing 5 showing the pulse wave sensor device by the 1st modification. 第２の変形例による脈波センサ装置を示す図５と同様な位置の斜視図である。It is a perspective view of the same position as Drawing 5 showing the pulse wave sensor device by the 2nd modification. 第３の実施の形態による脈波センサ装置を示す図５と同様な位置の斜視図である。It is a perspective view of the same position as Drawing 5 showing the pulse wave sensor device by a 3rd embodiment. 第４の実施の形態による脈波センサ装置を示す図４と同様な位置の斜視図である。It is a perspective view of the same position as Drawing 4 showing the pulse wave sensor device by a 4th embodiment. 第３の変形例による脈波センサ装置を示す図２と同様な位置の正面図である。It is a front view of the same position as Drawing 2 showing the pulse wave sensor device by the 3rd modification. 第４の変形例による脈波センサ装置を示す図５と同様な位置の斜視図である。It is a perspective view of the same position as Drawing 5 showing the pulse wave sensor device by the 4th modification. 第５の実施の形態による脈波センサ装置を示す断面図である。It is sectional drawing which shows the pulse wave sensor apparatus by 5th Embodiment. 第６の実施の形態による脈波センサ装置を示す図７と同様な位置の断面図である。It is sectional drawing of the position similar to FIG. 7 which shows the pulse wave sensor apparatus by 6th Embodiment.
　以下、本発明の実施の形態による脈波センサ装置について添付図面を参照しつつ詳細に説明する。なお、説明の便宜上、図１中の矢示Ｘ方向を左右方向、矢示Ｙ方向を奥行き方向、矢示Ｚ方向を上下方向とする。また、右手の人差し指（指Ｆ）を用いて脈波を測定する場合を例示して、説明をすすめる。 Hereinafter, a pulse wave sensor device according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. For convenience of explanation, the arrow X direction in FIG. 1 is the left-right direction, the arrow Y direction is the depth direction, and the arrow Z direction is the vertical direction. Further, the case where the pulse wave is measured using the index finger (finger F) of the right hand will be described as an example.
　図１ないし図８は第１の実施の形態による脈波センサ装置１を示している。この脈波センサ装置１は、図２に示すように、指Ｆから脈波に応じた光電脈波信号（脈波信号）を検出し、この光電脈波信号に基づいて、酸素飽和度、加速度脈波、脈拍ゆらぎ等の生体情報を生成することができ、さらに、脈拍ゆらぎから自律神経状態を推定することもできる。また、脈波センサ装置１は、小型軽量タイプの携帯型装置である。 1 to 8 show a pulse wave sensor device 1 according to the first embodiment. As shown in FIG. 2, the pulse wave sensor device 1 detects a photoelectric pulse wave signal (pulse wave signal) corresponding to the pulse wave from the finger F, and based on the photoelectric pulse wave signal, oxygen saturation, acceleration Biological information such as a pulse wave and a pulse fluctuation can be generated, and an autonomic state can be estimated from the pulse fluctuation. The pulse wave sensor device 1 is a small and lightweight portable device.
　筐体２は、脈波センサ装置１を構成する後述の発光器６および受光器７等を収容する。この筐体２は、例えば樹脂材料を用いて略直方体の箱型に形成され、正面板部２Ａ、周壁部２Ｂおよび背面板部２Ｃを有している。正面板部２Ａおよび背面板部２Ｃは、略四角形の平板状に形成されている。また、周壁部２Ｂは、正面板部２Ａおよび背面板部２Ｃの外周縁の間に挟まれ、奥行き方向に厚さを有する略四角形状の枠型に形成されている。 The housing 2 accommodates a light emitter 6 and a light receiver 7, which will be described later, constituting the pulse wave sensor device 1. The housing 2 is formed in a substantially rectangular parallelepiped box shape using, for example, a resin material, and includes a front plate portion 2A, a peripheral wall portion 2B, and a back plate portion 2C. The front plate portion 2A and the back plate portion 2C are formed in a substantially rectangular flat plate shape. The peripheral wall portion 2B is sandwiched between the outer peripheral edges of the front plate portion 2A and the back plate portion 2C, and is formed in a substantially rectangular frame shape having a thickness in the depth direction.
　正面板部２Ａの中央部には、例えば液晶パネル等からなる表示装置３を嵌めこむための表示用開口部２Ｄが形成され、表示用開口部２Ｄを介して表示装置３が筐体２に取付けられている。また、正面板部２Ａには、表示用開口部２Ｄの右側に位置して、測定の開始と停止を切り換えるためのスイッチ４が取付けられている。一方、周壁部２Ｂの上面右側には、開口面積の小さい２個の素子用開口部２Ｅ，２Ｆが形成され、これらの素子用開口部２Ｅ，２Ｆには、発光器６および受光器７がそれぞれ取付けられている。 A display opening 2D for fitting a display device 3 made of, for example, a liquid crystal panel or the like is formed in the central portion of the front plate portion 2A, and the display device 3 is attached to the housing 2 through the display opening 2D. It has been. In addition, a switch 4 for switching between starting and stopping of measurement is attached to the front plate portion 2A and is located on the right side of the display opening 2D. On the other hand, two element openings 2E and 2F having a small opening area are formed on the right side of the upper surface of the peripheral wall 2B, and the light emitter 6 and the light receiver 7 are respectively formed in the element openings 2E and 2F. Installed.
　筐体２の内部には、図７に示すように、２個の素子用開口部２Ｅの下側に位置して基板５が収容されている。基板５は、例えば筐体２の取付け部（図示せず）に嵌め込まれ、筐体２に固定されている。この基板５には、発光器６および受光器７が実装されている。 As shown in FIG. 7, a substrate 5 is housed inside the housing 2 so as to be positioned below the two element openings 2E. For example, the substrate 5 is fitted into an attachment portion (not shown) of the housing 2 and is fixed to the housing 2. A light emitter 6 and a light receiver 7 are mounted on the substrate 5.
　発光器６は、例えば発光ダイオード（ＬＥＤ）等の発光素子を透明樹脂で封止することによって形成されており、脈波センサ装置１の利用者の指Ｆに所定波長の光（例えば赤色光）を照射する。なお、発光器６は、発光素子として面発光レーザ（ＶＣＳＥＬ）または共振器型ＬＥＤを用いて形成してもよい。 The light emitter 6 is formed by sealing a light emitting element such as a light emitting diode (LED) with a transparent resin, and light having a predetermined wavelength (for example, red light) is applied to the finger F of the user of the pulse wave sensor device 1. Irradiate. The light emitter 6 may be formed using a surface emitting laser (VCSEL) or a resonator type LED as a light emitting element.
　また、発光器６は素子用開口部２Ｅに挿入されると共に、発光器６の表面が利用者の指Ｆと接触するように、通常は、例えば筐体２の周壁２Ｂの表面と一致するように配設されるが、周壁２Ｂの表面から突出するように配設してもよいし、また、窪ませて配設してもよい。なお、発光器６は、後述する発光器駆動部１１により駆動される。 In addition, the light emitter 6 is inserted into the element opening 2E, and is usually aligned with the surface of the peripheral wall 2B of the housing 2, for example, so that the surface of the light emitter 6 contacts the user's finger F. However, it may be arranged so as to protrude from the surface of the peripheral wall 2B, or may be arranged so as to be recessed. The light emitter 6 is driven by a light emitter drive unit 11 described later.
　受光器７は、前述のように発光器６から指Ｆに光が照射されると、指Ｆからの反射光を受光して光検出信号に変換し、この光検出信号を処理回路９の光検出信号増幅部１２に出力する。この受光器７は、例えばフォトダイオード（ＰＤ）等の受光素子を透明樹脂で封止することによって形成されている。なお、受光器７は、受光素子として例えばフォトトランジスタを用いて形成してもよい。 As described above, when the finger F is irradiated with light from the light emitter 6, the light receiver 7 receives the reflected light from the finger F and converts it into a light detection signal. Output to the detection signal amplifier 12. The light receiver 7 is formed by sealing a light receiving element such as a photodiode (PD) with a transparent resin. The light receiver 7 may be formed using, for example, a phototransistor as a light receiving element.
　また、受光器７は素子用開口部２Ｆに挿入されると共に、受光器７の表面が利用者の指Ｆと接触するように、通常は、例えば筐体２の周壁２Ｂの表面と一致するように配設されるが、周壁２Ｂの表面から突出するように配設してもよいし、また、窪ませて配設してもよい。 In addition, the light receiver 7 is inserted into the element opening 2F, and is usually aligned with the surface of the peripheral wall 2B of the housing 2, for example, so that the surface of the light receiver 7 contacts the user's finger F. However, it may be arranged so as to protrude from the surface of the peripheral wall 2B, or may be arranged so as to be recessed.
　そして、受光器７は、発光器６から照射されて利用者の指Ｆで反射した光を受光し、この受光した光を光検出信号に変換し、この光検出信号を処理回路９の光検出信号増幅部１２に出力する。 The light receiver 7 receives the light emitted from the light emitter 6 and reflected by the user's finger F, converts the received light into a light detection signal, and the light detection signal is detected by the processing circuit 9. Output to the signal amplifier 12.
　指Ｆの末節に配設される発光器６と受光器７との間の距離は、指Ｆの末節の長さよりも短い距離、例えば４～２０ｍｍまでの範囲内で設定されている。また、発光器６と受光器７との間には、発光器６から照射される光を受光器７が直接受光しないようにするために、例えば光学的に不透明な樹脂材料からなる遮光部８が設けられている。 The distance between the light emitter 6 and the light receiver 7 disposed at the last node of the finger F is set within a distance shorter than the length of the last node of the finger F, for example, 4 to 20 mm. Further, between the light emitter 6 and the light receiver 7, in order to prevent the light receiver 7 from directly receiving the light emitted from the light emitter 6, for example, a light shielding portion 8 made of an optically opaque resin material. Is provided.
　また、受光器７は、発光器６よりも例えば筐体２の左右方向の右端部に配設されている。これにより、利用者が筐体２の周壁部２Ｂに沿って指Ｆを発光器６および受光器７に接触させたときには、受光器７は、発光器６よりも血流の上流側に配置される構成となっている。 Further, the light receiver 7 is disposed, for example, at the right end of the housing 2 in the left-right direction rather than the light emitter 6. Thereby, when the user brings the finger F into contact with the light emitter 6 and the light receiver 7 along the peripheral wall portion 2B of the housing 2, the light receiver 7 is arranged on the upstream side of the blood flow with respect to the light emitter 6. It is the composition which becomes.
　処理回路９は、図８に示すように、光電脈波信号検出部１０および演算処理部１４から大略構成されており、筐体２の内部に設けられている。なお、処理回路９は、スイッチ４のオン／オフに応じて駆動／停止が切り換えられる。 As shown in FIG. 8, the processing circuit 9 is roughly composed of a photoelectric pulse wave signal detection unit 10 and an arithmetic processing unit 14, and is provided inside the housing 2. The processing circuit 9 is switched between driving / stopping according to the on / off state of the switch 4.
　光電脈波信号検出部１０は、発光器駆動部１１、光検出信号増幅部１２およびフィルタ部１３を備え、演算処理部１４と協働して利用者の光電脈波信号を生成する。ここで、発光器駆動部１１は、発光器６に接続され、発光器６を発光させるための駆動電流を供給する。光検出信号増幅部１２は、受光器７に接続され、受光器７から供給された光検出信号に対して電流－電圧変換を行い、電流－電圧変換された光検出信号を増幅する。フィルタ部１３は、例えば低域通過フィルタ等によって構成されると共に、光検出信号増幅部１２の後段に接続され、光検出信号増幅部１２から出力された光検出信号からノイズを除去する。 The photoelectric pulse wave signal detection unit 10 includes a light emitter drive unit 11, a light detection signal amplification unit 12, and a filter unit 13, and generates a photoelectric pulse wave signal of a user in cooperation with the arithmetic processing unit 14. Here, the light emitter driving unit 11 is connected to the light emitter 6 and supplies a driving current for causing the light emitter 6 to emit light. The light detection signal amplifier 12 is connected to the light receiver 7 and performs current-voltage conversion on the light detection signal supplied from the light receiver 7 to amplify the current-voltage converted light detection signal. The filter unit 13 is configured by, for example, a low-pass filter or the like, and is connected to the subsequent stage of the light detection signal amplification unit 12 to remove noise from the light detection signal output from the light detection signal amplification unit 12.
　そして、光電脈波信号検出部１０は、発光器駆動部１１を用いて発光器６を駆動し、光検出信号増幅部１２およびフィルタ部１３を用いて指Ｆからの反射光に応じた光検出信号を演算処理部１４に向けて出力する。 The photoelectric pulse wave signal detection unit 10 drives the light emitter 6 using the light emitter drive unit 11, and detects light according to the reflected light from the finger F using the light detection signal amplification unit 12 and the filter unit 13. The signal is output toward the arithmetic processing unit 14.
　演算処理部１４は例えば中央演算処理装置（ＣＰＵ）であり、発光器６の検出光を制御する処理、光検出信号から光電脈波信号を抽出する処理、光電脈波信号に基づいて脈波情報を生成する処理、脈波センサ装置１の全体的な制御等を行う。 The arithmetic processing unit 14 is, for example, a central processing unit (CPU), a process for controlling the detection light of the light emitter 6, a process for extracting a photoelectric pulse wave signal from the light detection signal, and pulse wave information based on the photoelectric pulse wave signal. The process which produces | generates, the whole control of the pulse wave sensor apparatus 1, etc. are performed.
　具体的には、演算処理部１４は、発光器６の検出光の強度やタイミングを制御するための制御信号を発光器駆動部１１に供給し、この制御信号に対応するように発光器６を発光させる。また、演算処理部１４は、受光器７から光検出信号増幅部１２およびフィルタ部１３を介して供給された光検出信号から光電脈波信号を抽出する処理を行う。さらに、演算処理部１４は、この光電脈波信号に基づいて、例えば脈波波形、脈拍数、酸素飽和度、血管硬化度等の脈波情報を生成する。そして、演算処理部１４は、この脈波情報を表示装置３に表示させる。 Specifically, the arithmetic processing unit 14 supplies a control signal for controlling the intensity and timing of the detection light of the light emitter 6 to the light emitter drive unit 11, and sets the light emitter 6 to correspond to this control signal. Make it emit light. In addition, the arithmetic processing unit 14 performs a process of extracting a photoelectric pulse wave signal from the light detection signal supplied from the light receiver 7 via the light detection signal amplification unit 12 and the filter unit 13. Furthermore, the arithmetic processing part 14 produces | generates pulse wave information, such as a pulse wave waveform, a pulse rate, oxygen saturation, a blood vessel hardening degree, for example based on this photoelectric pulse wave signal. Then, the arithmetic processing unit 14 causes the display device 3 to display this pulse wave information.
　血流阻害低減部１５は、図７に示すように、発光器６および受光器７と近接する筐体２の左右方向（Ｘ方向）の右端部に、筐体２と一体に形成される。具体的には、血流阻害低減部１５は、ＸＺ面による断面形状が略三角形の略三角柱状に形成され、筐体２と接しないＸＺ面断面の略三角形の頂点をつなぐ角隅部１５Ａから、筐体２と接するＸＺ面断面の略三角形状の右側の頂点をつなぐ角隅部１５Ｂに向けてなだらかに傾斜する、上に凸の接触部１５Ｃと、角隅部１５Ａから筐体２と接するＸＺ面断面の略三角形状の左側の頂点をつなぐ角隅部１５Ｄに向けて急峻に傾斜する、段差形成部１５Ｅとを備えている。 As shown in FIG. 7, the blood flow inhibition reducing portion 15 is formed integrally with the housing 2 at the right end in the left-right direction (X direction) of the housing 2 adjacent to the light emitter 6 and the light receiver 7. Specifically, the blood flow inhibition reducing unit 15 is formed from a corner portion 15A that is formed in a substantially triangular prism shape having a substantially triangular cross section by the XZ plane and connects the apexes of the substantially triangular XZ plane cross section that does not contact the housing 2. An upward convex contact portion 15C that inclines gently toward the corner corner 15B that connects the apex on the right side of the substantially triangular shape of the XZ plane cross section that contacts the casing 2, and the casing 2 contacts the casing 2 from the corner corner 15A A step forming portion 15E that steeply inclines toward the corner portion 15D that connects the apexes on the left side of the substantially triangular shape of the XZ plane cross section.
　脈波センサ装置１の利用者が指Ｆの末節Ａを発光器６および受光器７に接触させると、指Ｆの中節Ｂが接触部１５Ｃに接触する。この結果、指Ｆの末節Ａの先端側が周壁部２Ｂの表面によって、また、指Ｆの中節Ｂが接触部１５Ｃによって支持されるから、指Ｆの末節Ａの第１関節寄りの部位は周壁部２Ｂの表面とは接触せず、指Ｆの末節Ａの第１関節寄りの部位と周壁部２Ｂ等との間には隙間Ｓが生じ、指Ｆの末節Ａの第１関節寄りの部位を浮いた状態に保つことができる。この結果、指Ｆの末節Ａの第１関節寄りの部位に対する圧迫が低下し、指Ｆの末節Ａの血流の阻害が抑制される。なお、指Ｆの末節Ａとは、指Ｆの第１関節から指先までの部位であり、指Ｆの中節Ｂとは、指Ｆの第１関節から第２関節までの部位である。 When the user of the pulse wave sensor device 1 brings the last node A of the finger F into contact with the light emitter 6 and the light receiver 7, the middle node B of the finger F comes into contact with the contact portion 15C. As a result, the distal end side of the last node A of the finger F is supported by the surface of the peripheral wall portion 2B, and the middle node B of the finger F is supported by the contact portion 15C. A gap S is formed between the portion near the first joint of the terminal node A of the finger F and the peripheral wall portion 2B, etc. without contacting the surface of the part 2B, and the region of the finger F near the first joint A It can be kept floating. As a result, the pressure on the part near the first joint of the terminal node A of the finger F is reduced, and the inhibition of the blood flow of the terminal node A of the finger F is suppressed. Note that the last node A of the finger F is a part from the first joint of the finger F to the fingertip, and the middle node B of the finger F is a part from the first joint to the second joint of the finger F.
　また、指Ｆの末節Ａの血流の阻害を抑制するためには、指Ｆの末節Ａの中央部や指Ｆの中節Ｂに比べて、指Ｆの末節Ａの第１関節寄りの部位に対する圧迫を小さくすればよい。このため、指Ｆの末節Ａの第１関節寄りの部位が、段差形成部１５Ｅ等に僅かに接触する構成としてもよく、この場合における隙間Ｓの大きさは上述した場合と比べてわずかとなる。 In addition, in order to suppress the blood flow inhibition of the terminal node A of the finger F, the portion closer to the first joint of the terminal node A of the finger F than the central part of the terminal node A of the finger F or the middle node B of the finger F. What is necessary is to reduce the pressure on the. For this reason, it is good also as a structure which the site | part close | similar to the level | step difference formation part 15E etc. may be sufficient as the site | part close | similar to the 1st joint of the last node A of the finger F, and the magnitude | size of the clearance gap S in this case becomes small compared with the case mentioned above. .
　なお、血流阻害低減部１５には、接触部１５Ｃと指Ｆの中節Ｂとの接触位置を調整するため、筐体２に対して左右方向に可動可能な機構を形成してもよく、また、脈波を測定するときだけ筐体２から血流阻害低減部１５が突出する構成としてもよい。さらに、血流阻害低減部１５は、硬質な金属材料、樹脂材料等を用いて形成してもよく、指Ｆに馴染ませるために例えば軟質な材料等によって形成してもよい。 In addition, in order to adjust the contact position between the contact portion 15C and the middle node B of the finger F, the blood flow inhibition reducing portion 15 may be formed with a mechanism movable in the left-right direction with respect to the housing 2. Moreover, it is good also as a structure which the blood flow inhibition reduction part 15 protrudes from the housing | casing 2 only when measuring a pulse wave. Further, the blood flow inhibition reducing portion 15 may be formed using a hard metal material, a resin material, or the like, or may be formed using a soft material or the like, for example, so as to be familiar with the finger F.
　指先位置決め部１６は、脈波センサ装置１の利用者の指Ｆの末節Ａの先端が接触する周壁部２Ｂの表面位置に、周壁部２Ｂの表面から突出した突起によって形成される。なお、指先位置決め部１６と血流阻害低減部１５との間の間隔寸法は、指Ｆの末節Ａの先端側が周壁部２Ｂの表面によって、また、指Ｆの中節Ｂが接触部１５Ｃによって支持されることを前提に、一般的な人体の人差し指Ｆの末節Ａの長さ寸法に基づいて設定される。 The fingertip positioning portion 16 is formed by a protrusion protruding from the surface of the peripheral wall portion 2B at the surface position of the peripheral wall portion 2B where the tip of the terminal node A of the finger F of the user of the pulse wave sensor device 1 contacts. The distance between the fingertip positioning unit 16 and the blood flow inhibition reducing unit 15 is such that the distal end side of the terminal node A of the finger F is supported by the surface of the peripheral wall 2B, and the middle node B of the finger F is supported by the contact unit 15C. It is set based on the length dimension of the last clause A of the index finger F of a general human body.
　これにより、利用者が指Ｆの末節Ａを発光器６および受光器７に接触させたときには、指先が指先位置決め部１６に当接すると共に、指Ｆの中節Ｂが血流阻害低減部１５の接触部１５Ｃに接触する。即ち、指先位置決め部１６は、指先が左右方向の左側に大きく位置ずれして配置されるのを規制し、第１関節近傍から血流阻害低減部１５が必要以上に離れるのを防止している。 As a result, when the user brings the terminal node A of the finger F into contact with the light emitter 6 and the light receiver 7, the fingertip contacts the fingertip positioning unit 16, and the middle node B of the finger F becomes the blood flow inhibition reducing unit 15. Contact the contact portion 15C. That is, the fingertip positioning unit 16 restricts the fingertip from being greatly displaced on the left side in the left-right direction, and prevents the blood flow inhibition reducing unit 15 from being unnecessarily separated from the vicinity of the first joint. .
　本発明の第１の実施形態による脈波センサ装置１は以上のような構成を有するものであり、次にその動作を説明する。 The pulse wave sensor device 1 according to the first embodiment of the present invention has the above-described configuration, and the operation thereof will be described next.
　まず、利用者は、指Ｆを発光器６および受光器７に接触させた後、スイッチ４をオンに切り換える。これにより、演算処理部１４から発光器駆動部１１に向けて制御信号が供給され、この制御信号に応じて発光器６が検出光を発光する。この検出光は利用者の指Ｆの末節Ａで反射し、この反射光が受光器７によって受光される。そして、受光器７は、この反射光に対応する光検出信号を出力する。この光検出信号は、光検出信号増幅部１２により電流－電圧変換された後に増幅され、さらにフィルタ部１３によりノイズが除去された後に、演算処理部１４に供給される。 First, after the user brings the finger F into contact with the light emitter 6 and the light receiver 7, the switch 4 is turned on. As a result, a control signal is supplied from the arithmetic processing unit 14 toward the light emitter drive unit 11, and the light emitter 6 emits detection light according to the control signal. This detection light is reflected by the terminal node A of the user's finger F, and this reflected light is received by the light receiver 7. The light receiver 7 outputs a light detection signal corresponding to the reflected light. This photodetection signal is amplified after being subjected to current-voltage conversion by the photodetection signal amplifying unit 12, and after noise is removed by the filter unit 13, the photodetection signal is supplied to the arithmetic processing unit 14.
　演算処理部１４は、フィルタ部１３から供給された光検出信号から発光器６の検出光に対応する光電脈波信号を抽出する。そして、演算処理部１４は、抽出した光電脈波信号に基づいて、例えば脈波波形、脈拍数、酸素飽和度、血管硬化度等の脈波情報を生成する。これら脈波情報は表示装置３に表示される。 The arithmetic processing unit 14 extracts a photoelectric pulse wave signal corresponding to the detection light of the light emitter 6 from the light detection signal supplied from the filter unit 13. Then, based on the extracted photoelectric pulse wave signal, the arithmetic processing unit 14 generates pulse wave information such as a pulse wave waveform, a pulse rate, an oxygen saturation, and a vascular stiffness. The pulse wave information is displayed on the display device 3.
　このとき、利用者が発光器６および受光器７に対して指Ｆを強く押付けると、検出部位となる末節Ａでの血流が阻害されて、脈波の検出ができなくなる。指Ｆの血流が阻害されない場合は、図１０中の実線に示すような光電脈波信号が得られる。しかしながら、指Ｆの血流が阻害された場合には、図１０中の二点鎖線に示すように、光電脈波信号の変動が小さくなったり、図１０中の破線に示すように、光電脈波信号が殆ど変動しなくなる。しかしながら、指Ｆのどの部位を押した場合でも末節Ａの血流が一様に阻害される訳ではなく、圧迫する指Ｆの部位に応じて血流に対する影響は異なる。即ち、指Ｆには、血流が阻害され易い部位と血流が阻害され難い部位とが存在する。 At this time, if the user strongly presses the finger F against the light emitter 6 and the light receiver 7, the blood flow at the end node A, which is the detection site, is obstructed and the pulse wave cannot be detected. When the blood flow of the finger F is not inhibited, a photoelectric pulse wave signal as shown by the solid line in FIG. 10 is obtained. However, when the blood flow of the finger F is inhibited, the fluctuation of the photoelectric pulse wave signal becomes small as shown by the two-dot chain line in FIG. 10, or the photoelectric pulse as shown by the broken line in FIG. The wave signal hardly fluctuates. However, when any part of the finger F is pressed, the blood flow in the terminal node A is not uniformly inhibited, and the influence on the blood flow differs depending on the part of the finger F to be pressed. That is, the finger F has a part where the blood flow is easily inhibited and a part where the blood flow is difficult to be inhibited.
　そこで、本発明者が鋭意検討したところ、指Ｆの末節Ａの第１関節寄りの部位を圧迫したときに、末節Ａでの血流が最も阻害され易いことを見出した。この点を考慮して、本実施の形態における筐体２には、周壁部２Ｂの表面から突出した血流阻害低減部１５を発光器６および受光器７の周囲に位置して設けている。これにより、利用者が指Ｆの末節Ａを発光器６および受光器７に接触させると、指Ｆの中節Ｂが血流阻害低減部１５に接触するから、指Ｆの末節Ａの第１関節寄りの部位を浮いた状態に保つことができる。この結果、指Ｆの末節Ａの中央部や指Ｆの中節Ｂに比べて、末節Ａの第１関節寄りの部位に作用する圧迫が小さくなり、血流の阻害を低減することができる。 Therefore, when the present inventor diligently studied, it was found that the blood flow in the terminal node A is most likely to be inhibited when the portion of the finger F near the first joint of the terminal node A is compressed. In consideration of this point, the housing 2 in the present embodiment is provided with a blood flow inhibition reducing portion 15 protruding from the surface of the peripheral wall portion 2 </ b> B so as to be positioned around the light emitter 6 and the light receiver 7. Thereby, when the user contacts the terminal node A of the finger F with the light emitter 6 and the light receiver 7, the middle node B of the finger F contacts the blood flow inhibition reducing unit 15. The part close to the joint can be kept floating. As a result, compared to the central portion of the distal node A of the finger F and the middle node B of the finger F, the pressure acting on the portion of the distal node A closer to the first joint is reduced, and blood flow inhibition can be reduced.
　ここで、図９に示す試験的な血流阻害低減部１７を筐体２に設け、血流阻害低減部１７の形状および位置が血流に及ぼす効果についての検討結果を説明する。 Here, the experimental blood flow inhibition reducing unit 17 shown in FIG. 9 is provided in the housing 2, and the examination results on the effect of the shape and position of the blood flow inhibition reducing unit 17 on the blood flow will be described.
　まず、血流阻害低減部１７の形状の効果を比較するため、奥行き方向の厚みが一定で、上下方向の突出寸法ｔおよび左右方向の長さ寸法Ｌを変えた、四角柱状のサンプルを種々形成した。次に、血流阻害低減部１７と指Ｆとの接触位置を変えながら、指Ｆの血流が阻害されて脈波が測定できなくなるときの指Ｆの押圧力を５Ｎ（ニュートン）刻みで変化させて測定した。 First, in order to compare the effects of the shape of the blood flow inhibition reducing portion 17, various rectangular column-shaped samples having a constant thickness in the depth direction and varying the vertical projecting dimension t and the horizontal dimension L are formed. did. Next, while changing the contact position between the blood flow inhibition reducing unit 17 and the finger F, the pressing force of the finger F when the blood flow of the finger F is inhibited and the pulse wave cannot be measured is changed in increments of 5N (Newton). And measured.
　長さ寸法Ｌを２～１３ｍｍの範囲で変化させても、血流が阻害されて脈波が測定できなくなる指Ｆの押圧力は殆ど変化せず、長さ寸法Ｌへの大きな依存性は見出せなかった。一方、血流阻害低減部１７における左右方向の左端の角隅部１７Ａと、指Ｆの第１関節との位置関係および血流阻害低減部１７の突出寸法ｔが、血流が阻害されて脈波が測定できなくなる指Ｆの押圧力に大きく影響することを見出した。表１に、血流阻害低減部１７の角隅部１７Ａと指Ｆの第１関節との間の距離寸法ｄを－２ｍｍ～＋８ｍｍの範囲で変化させると共に、筐体２の表面から接触部１７Ｂまでの突出寸法ｔを０ｍｍ～８ｍｍの範囲で変化させたときの、脈波が測定できなくなる際の指Ｆの押圧力の測定結果を示す。 Even if the length dimension L is changed in the range of 2 to 13 mm, the pressing force of the finger F that prevents blood flow from being blocked due to blood flow hardly changes, and a large dependence on the length dimension L can be found. There wasn't. On the other hand, the positional relationship between the left corner 17A in the left-right direction in the blood flow inhibition reducing unit 17 and the first joint of the finger F and the protruding dimension t of the blood flow inhibition reducing unit 17 are affected by the blood flow being inhibited. It has been found that the pressing force of the finger F that makes it impossible to measure the wave greatly affects. Table 1 shows that the distance d between the corner 17A of the blood flow inhibition reducing portion 17 and the first joint of the finger F is changed in the range of −2 mm to +8 mm, and the contact portion 17B from the surface of the housing 2 is changed. The measurement result of the pressing force of the finger F when the pulse wave cannot be measured when the projecting dimension t is changed in the range of 0 mm to 8 mm is shown.
　なお、距離寸法ｄは、指Ｆの第１関節の位置を基点として、血流阻害低減部１７の角隅部１７Ａが指Ｆの第１関節の位置よりも右側（第２関節側）にある場合を正の距離寸法とし、血流阻害低減部１７の角隅部１７Ａが指Ｆの第１関節よりも左側（指先側）にある場合を負の距離寸法としている。また、突出寸法ｔは、筐体２の表面を基点としている。




















The distance dimension d is based on the position of the first joint of the finger F, and the corner portion 17A of the blood flow inhibition reducing unit 17 is on the right side (second joint side) of the position of the first joint of the finger F. The case is defined as a positive distance dimension, and the case where the corner 17A of the blood flow inhibition reducing unit 17 is on the left side (fingertip side) of the first joint of the finger F is defined as a negative distance dimension. The protruding dimension t is based on the surface of the housing 2.




















Figure JPOXMLDOC01-appb-T000001
Figure JPOXMLDOC01-appb-T000001
　表１の結果によれば、角隅部１７Ａよりも指Ｆの第１関節が左側に配置されて距離寸法ｄが負の値となる場合には、指Ｆの押圧力が加わると、角隅部１７Ａによって指Ｆの末節Ａの領域における第１関節寄りの部位が強く圧迫される。このため、指Ｆの押圧力が小さくとも、血流が阻害されやすくなる。また、距離寸法ｄが８ｍｍを超えると、指Ｆの末節Ａの第１関節寄りの部位が筐体２の表面に直接に接触するため、指Ｆの押圧力によって指Ｆの末節Ａの領域における第１関節寄りの部位が強く圧迫される。このため、指Ｆの押圧力が小さくとも、血流が阻害されやすくなる。 According to the results in Table 1, when the first joint of the finger F is arranged on the left side of the corner portion 17A and the distance dimension d is a negative value, when the pressing force of the finger F is applied, the corner The part near the first joint in the region of the last node A of the finger F is strongly pressed by the portion 17A. For this reason, even if the pressing force of the finger F is small, blood flow tends to be hindered. If the distance dimension d exceeds 8 mm, the portion of the finger F near the first joint of the finger F directly contacts the surface of the housing 2, so that the finger F is pressed in the region of the terminal node A of the finger F. The part near the first joint is strongly pressed. For this reason, even if the pressing force of the finger F is small, blood flow tends to be hindered.
　これに対し、角隅部１７Ａよりも指Ｆの第１関節が右側に配置されて距離寸法ｄが０～６ｍｍの正の値となる範囲では、指Ｆの末節Ａの第１関節寄りの部位が浮いた状態に保たれるので、指Ｆの押圧力が加わっても角隅部１７Ａによって指Ｆの末節Ａの領域における第１関節寄りの部位が強く圧迫されることはない。このため、指Ｆの押圧力が大きくとも、血流が阻害され難くなる。特に、血流阻害低減部１７の角隅部１７Ａが、指Ｆの中節Ｂの領域の第１関節に近い位置に配置された場合（例えば距離寸法ｄが２ｍｍとなるとき）には、血流阻害の低減効果が大きくなる。 On the other hand, in the range where the first joint of the finger F is arranged on the right side of the corner 17A and the distance dimension d is a positive value of 0 to 6 mm, the portion of the finger F closer to the first joint A Therefore, even when the pressing force of the finger F is applied, the portion near the first joint in the region of the terminal node A of the finger F is not strongly pressed by the corner portion 17A. For this reason, even if the pressing force of the finger F is large, the blood flow is hardly inhibited. In particular, when the corner portion 17A of the blood flow inhibition reducing unit 17 is arranged at a position close to the first joint in the region of the middle joint B of the finger F (for example, when the distance dimension d is 2 mm), the blood The effect of reducing the flow inhibition is increased.
　血流阻害低減部１７の突出寸法ｔを１ｍｍ以下の値にした場合には、段差形成部１７Ｃが小さくなると共に、脈波を測定できなくなる指Ｆの押圧力は小さくなる。この場合、角隅部１７Ａと筐体２の表面との間の段差が不足して指Ｆの末節Ａの第１関節寄りの部位が筐体２の表面に直接接触するから、指Ｆの押圧力によって指Ｆの末節Ａの領域における第１関節寄りの部位が強く圧迫される。このため、指Ｆの押圧力が小さくとも、血流が阻害され易くなる。 When the protruding dimension t of the blood flow inhibition reducing portion 17 is set to a value of 1 mm or less, the step forming portion 17C becomes small and the pressing force of the finger F that cannot measure the pulse wave becomes small. In this case, the step between the corner 17A and the surface of the housing 2 is insufficient, and the portion of the finger F near the first joint A directly contacts the surface of the housing 2; The part near the first joint in the region of the terminal node A of the finger F is strongly pressed by the pressure. For this reason, even if the pressing force of the finger F is small, the blood flow is easily inhibited.
　一方、血流阻害低減部１７の突出寸法ｔを２ｍｍ以上の値にした場合には、段差形成部１７Ｃが大きくなると共に、脈波を測定できなくなる指Ｆの押圧力は大きくなる。この場合、角隅部１７Ａと筐体２の表面との間の段差によって、末節Ａの第１関節寄りの部位が浮くため、指Ｆの押圧力によって指Ｆの末節Ａの領域における第１関節寄りの部位が強く圧迫されることはない。このため、指Ｆの押圧力が大きくとも、血流が阻害され難くなる。 On the other hand, when the protrusion dimension t of the blood flow inhibition reducing portion 17 is set to a value of 2 mm or more, the step forming portion 17C is increased and the pressing force of the finger F that cannot measure the pulse wave is increased. In this case, a portion near the first joint of the terminal node A floats due to a step between the corner portion 17A and the surface of the housing 2, so that the first joint in the region of the terminal node A of the finger F by the pressing force of the finger F The close part is not strongly pressed. For this reason, even if the pressing force of the finger F is large, the blood flow is hardly inhibited.
　但し、突出寸法ｔを例えば１ｃｍ以上のように大きくし過ぎると、利用者に違和感を与えるのに加え、指Ｆの末節Ａが発光器６や受光器７から離れ易くなり、外部からの外乱光の影響を受け易くなる。 However, if the protruding dimension t is too large, for example, 1 cm or more, in addition to making the user feel uncomfortable, the terminal A of the finger F is likely to be separated from the light emitter 6 and the light receiver 7, and external disturbance light from outside. It becomes easy to be affected.
　以上の結果から、脈波を測定する際に、血流の阻害を低減するためには、指Ｆの末節Ａの領域における第１関節寄りの部位を圧迫しないことの重要性を見出した。従って、指Ｆの第１関節から血流阻害低減部１７までの距離寸法ｄは、例えば０～６ｍｍ程度の値、好ましくは１～３ｍｍ程度の値に設定するのが好ましい。また、血流阻害低減部１７の突出寸法ｔは、例えば２～８ｍｍ程度の値、好ましくは３～５ｍｍ程度の値に設定するのが好ましい。このため、第１の実施の形態による脈波センサ装置１でも、血流阻害低減部１５の突出寸法ｔや配置は、このような値を参考にして設定されている。但し、指Ｆの大きさ等には個人差があるため、以上の値は一例を示すものである。 From the above results, in order to reduce the blood flow inhibition when measuring the pulse wave, it was found that it is important not to compress the portion near the first joint in the region of the terminal node A of the finger F. Accordingly, the distance dimension d from the first joint of the finger F to the blood flow inhibition reducing unit 17 is preferably set to a value of, for example, about 0 to 6 mm, and preferably about 1 to 3 mm. Further, the protrusion dimension t of the blood flow inhibition reducing portion 17 is preferably set to a value of, for example, about 2 to 8 mm, and preferably to a value of about 3 to 5 mm. For this reason, also in the pulse wave sensor device 1 according to the first embodiment, the protruding dimension t and the arrangement of the blood flow inhibition reducing unit 15 are set with reference to such values. However, since there are individual differences in the size and the like of the finger F, the above values are examples.
　以上説明した通り、第１の実施の形態による脈波センサ装置１によれば、筐体２に血流阻害低減部１５を設けたから、利用者が指Ｆの末節Ａを発光器６および受光器７に接触させると、指Ｆの中節Ｂが血流阻害低減部１５の接触部１５Ｃに接触する。これにより、指Ｆの末節Ａの先端側と指Ｆの中節Ｂとが、発光器６および受光器７の周囲の筐体２と血流阻害低減部１５とによってそれぞれ支持されるから、これらの間に位置する指Ｆの末節Ａの第１関節寄りの部位では、指Ｆの押圧力による圧迫を低減することができる。即ち、発光器６等の接触面となる筐体２の周壁部２Ｂの表面と血流阻害低減部１５の接触部１５Ｃとの間には、段差形成部１５Ｅによって段差が形成されているから、この段差によって指Ｆの末節Ａの第１関節寄りの部位に作用する圧迫を低減することができる。 As described above, according to the pulse wave sensor device 1 according to the first embodiment, since the blood flow inhibition reducing unit 15 is provided in the housing 2, the user connects the terminal A of the finger F with the light emitter 6 and the light receiver. 7, the middle node B of the finger F contacts the contact part 15 </ b> C of the blood flow inhibition reducing unit 15. Accordingly, the distal end side of the terminal node A of the finger F and the middle node B of the finger F are supported by the casing 2 and the blood flow inhibition reducing unit 15 around the light emitter 6 and the light receiver 7, respectively. In a region near the first joint of the last node A of the finger F located between the two, the pressure due to the pressing force of the finger F can be reduced. That is, a step is formed by the step forming portion 15E between the surface of the peripheral wall portion 2B of the housing 2 that becomes the contact surface of the light emitter 6 and the contact portion 15C of the blood flow inhibition reducing portion 15, This step can reduce the pressure acting on the portion of the finger F closer to the first joint of the terminal node A.
　このため、指Ｆの末節Ａの第１関節寄りの部位が圧迫されるのを防止することができるから、発光器６等に指Ｆを強く押付けたときでも、末節Ａの血流が阻害されることがなく、脈波が測定可能な指Ｆの押圧力を高めることができる。この結果、押圧力を小さい状態に保持して安定させる必要がないから、利用者の負担を軽減して、脈波を容易に検出することができる。 For this reason, it is possible to prevent the portion near the first joint of the terminal node A of the finger F from being pressed, so even when the finger F is strongly pressed against the light emitter 6 or the like, the blood flow of the terminal node A is inhibited. Therefore, the pressing force of the finger F that can measure the pulse wave can be increased. As a result, since it is not necessary to keep the pressing force small and stable, it is possible to reduce the burden on the user and easily detect the pulse wave.
　また、筐体２には指先と接触する指先位置決め部１６を設けたから、指先の位置を固定して血流阻害低減部１５と指Ｆの中節Ｂとの位置決めを行うことができる。これにより、例えば血流阻害低減部１５が指Ｆの末節Ａの第１関節寄りの部位に接触したり、血流阻害低減部１５が指Ｆの第１関節から離れ過ぎるのを防止することができるから、血流阻害低減部１５を指Ｆの中節Ｂに確実に接触させることができ、末節Ａの第１関節寄りの部位に対する圧迫を確実に低減することができる。 In addition, since the fingertip positioning unit 16 that comes into contact with the fingertip is provided in the housing 2, the position of the fingertip can be fixed and the blood flow inhibition reducing unit 15 and the middle node B of the finger F can be positioned. Thereby, for example, it is possible to prevent the blood flow inhibition reducing unit 15 from coming into contact with the portion of the finger F near the first joint of the finger F, or preventing the blood flow inhibition reducing unit 15 from being separated too far from the first joint of the finger F. Therefore, the blood flow inhibition reducing unit 15 can be reliably brought into contact with the middle node B of the finger F, and the pressure on the portion of the terminal node A near the first joint can be reliably reduced.
　また、筐体２には表示装置３を設けたから、該表示装置３を目視することによって、例えば脈波波形等の脈波情報を確認することができる。また、筐体２には発光器６および受光器７に加えて処理回路９および表示装置３を設けたから、これらによって脈波の測定と脈波情報の表示を行うことができ、携帯型の脈波センサ装置１を構成することができる。 Further, since the display device 3 is provided in the housing 2, by visually observing the display device 3, for example, pulse wave information such as a pulse wave waveform can be confirmed. Further, since the casing 2 is provided with the processing circuit 9 and the display device 3 in addition to the light emitter 6 and the light receiver 7, the pulse wave can be measured and the pulse wave information can be displayed by these, and the portable pulse can be displayed. The wave sensor device 1 can be configured.
　また、携帯型の脈波センサ装置１の場合、筐体２を把持した状態で脈波を測定するから、指Ｆの押圧力が強くなり易い傾向がある。特に、携帯型の脈波センサ装置１では、指Ｆの第２関節を折曲げた状態で指Ｆの末節Ａを発光器６等に接触させるから、指Ｆを伸ばした状態で測定する場合に比べて、指Ｆの押圧力が高くなり易い。このため、例えば特許文献２，３のように、発光部を突出して設けた場合には、強い押圧力によって指Ｆの末節Ａの第１関節寄りの部位も圧迫されてしまい、脈波が検出できなくなることがある。これに対し、本実施の形態では、筐体２に血流阻害低減部１５を設けたから、該血流阻害低減部１５によって末節Ａの第１関節寄りの部位の圧迫を抑制することができ、指Ｆの押圧力が高くなるときでも、脈波を容易に検出することができる。 Further, in the case of the portable pulse wave sensor device 1, the pulse wave is measured while holding the housing 2, so that the pressing force of the finger F tends to be strong. In particular, in the portable pulse wave sensor device 1, since the terminal node A of the finger F is brought into contact with the light emitter 6 or the like with the second joint of the finger F folded, the measurement is performed with the finger F extended. In comparison, the pressing force of the finger F tends to be high. For this reason, for example, as in Patent Documents 2 and 3, when the light emitting portion is provided so as to protrude, a portion close to the first joint of the terminal node A of the finger F is also pressed by a strong pressing force, and a pulse wave is detected. It may not be possible. On the other hand, in this embodiment, since the blood flow inhibition reducing portion 15 is provided in the housing 2, the blood flow inhibition reducing portion 15 can suppress the compression of the portion near the first joint of the terminal node A, Even when the pressing force of the finger F increases, the pulse wave can be easily detected.
　さらに、特許文献３のように、指先の接触する凸部に発光部を設けると共に、動脈血流の上流側に位置する凹部に受光部を設けた場合には、指先を支持する２つの接触面の間の距離が長いことから、指の浮いている部分が長くなる。このため、測定時における指と受光部との距離を測定の度に一定に保つことが難しくなり、Ｓ／Ｎが低下し易い。これに対し、本実施の形態では、指Ｆの末節Ａを発光器６および受光器７に接触させることができるから、このような問題を解消することができ、脈波の検出精度を高めることができる。 Furthermore, as in Patent Document 3, when the light emitting portion is provided in the convex portion that contacts the fingertip and the light receiving portion is provided in the concave portion located upstream of the arterial blood flow, two contact surfaces that support the fingertip Since the distance between is long, the floating part of the finger becomes long. For this reason, it is difficult to keep the distance between the finger and the light receiving unit at the time of measurement constant, and the S / N is likely to be lowered. On the other hand, in this embodiment, since the terminal node A of the finger F can be brought into contact with the light emitter 6 and the light receiver 7, such a problem can be solved and the pulse wave detection accuracy can be improved. Can do.
　次に、図１１は本発明の第２の実施の形態を示している。そして、本実施の形態の特徴は、血流阻害低減部に指の中節との接触位置を調整する機構を設けたことにある。なお、本実施の形態では、前記第１の実施の形態と同一の構成要素に同一の符号を付し、その説明を省略するものとする。 Next, FIG. 11 shows a second embodiment of the present invention. The feature of this embodiment is that a mechanism for adjusting the contact position with the middle joint of the finger is provided in the blood flow inhibition reducing portion. In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.
　脈波センサ装置２１は、第１の実施の形態による脈波センサ装置１とほぼ同様に、筐体２、表示装置３、発光器６、受光器７等を備えている。また、筐体２の周壁部２Ｂの表面には、発光器６および受光器７よりも筐体２の右端部に位置して血流阻害低減部２２が設けられると共に、発光器６および受光器７を挟んで左右方向の反対側の位置には指先位置決め部１６が設けられている。 The pulse wave sensor device 21 includes a housing 2, a display device 3, a light emitter 6, a light receiver 7, and the like, almost the same as the pulse wave sensor device 1 according to the first embodiment. Further, a blood flow inhibition reducing portion 22 is provided on the surface of the peripheral wall portion 2B of the housing 2 so as to be positioned at the right end portion of the housing 2 relative to the light emitter 6 and the light receiver 7, and the light emitter 6 and the light receiver. A fingertip positioning portion 16 is provided at a position on the opposite side in the left-right direction across 7.
　また、血流阻害低減部２２は、第１の実施の形態による血流阻害低減部１５とほぼ同様に形成され、角隅部２２Ａ、接触部２２Ｂ、段差形成部２２Ｃを備えている。但し、血流阻害低減部２２は、左右方向に対する長さ寸法が変更可能となっている点で、第１の実施の形態による血流阻害低減部１５とは異なる。即ち、角隅部２２Ａ、段差形成部２２Ｃは、左右方向に対して変位可能となり、血流阻害低減部２２と発光器６および受光器７との間の距離寸法が変更可能となっている。 Further, the blood flow inhibition reducing portion 22 is formed in substantially the same manner as the blood flow inhibition reducing portion 15 according to the first embodiment, and includes a corner portion 22A, a contact portion 22B, and a step forming portion 22C. However, the blood flow inhibition reducing unit 22 is different from the blood flow inhibition reducing unit 15 according to the first embodiment in that the length dimension in the left-right direction can be changed. That is, the corner portion 22A and the step forming portion 22C can be displaced in the left-right direction, and the distance dimension between the blood flow inhibition reducing portion 22, the light emitter 6 and the light receiver 7 can be changed.
　なお、このような角隅部２２Ａおよび段差形成部２２Ｃの変位機構として、血流阻害低減部２２全体を左右方向にスライド可能に設ける、段差形成部２２Ｃ等を左右方向に進退可能な別部材によって形成する、着脱可能なアダプターを設ける等が考えられる。 In addition, as a displacement mechanism of the corner portion 22A and the step forming portion 22C, the entire blood flow inhibition reducing portion 22 is provided so as to be slidable in the left-right direction. For example, it may be possible to form a removable adapter.
　かくして、第２の実施の形態でも第１の実施の形態と同様の作用効果を得ることができる。特に、第２の実施の形態では、血流阻害低減部２２の角隅部２２Ａおよび段差形成部２２Ｃは、発光器６および受光器７に対して変位可能に設けたから、指Ｆの末節Ａの長さ寸法が大きい場合には発光器６等と血流阻害低減部２２との間の距離寸法を大きくし、指Ｆの末節Ａの長さ寸法が小さい場合には発光器６等と血流阻害低減部２２との間の距離寸法を小さくすることができる。このため、指Ｆの末節Ａの長さ寸法、即ち指先と第１関節との間の長さ寸法が利用者毎に大きく異なるときでも、血流阻害低減部２２が指Ｆの末節Ａの第１関節寄りの部位に接触することがなく、利用者毎の指Ｆの末節Ａの長さ寸法の相違を許容することができる。 Thus, in the second embodiment, the same operational effects as those in the first embodiment can be obtained. In particular, in the second embodiment, the corner portion 22A and the step forming portion 22C of the blood flow inhibition reducing portion 22 are provided so as to be displaceable with respect to the light emitter 6 and the light receiver 7. When the length dimension is large, the distance dimension between the light emitter 6 and the like and the blood flow inhibition reducing unit 22 is increased, and when the length dimension of the terminal node A of the finger F is small, the light emitter 6 and the blood flow are increased. The distance between the inhibition reducing unit 22 can be reduced. For this reason, even when the length dimension of the terminal node A of the finger F, that is, the length dimension between the fingertip and the first joint is greatly different for each user, the blood flow inhibition reducing unit 22 has the It is possible to allow a difference in the length dimension of the terminal node A of the finger F for each user without touching a portion closer to one joint.
　なお、第２の実施の形態では、発光器６および受光器７と血流阻害低減部２２との間の距離寸法を変更可能にする構成とした。しかし、本発明はこれに限らず、例えば図１２に示す第１の変形例による脈波センサ装置３１のように、指先位置決め部３２を左右方向に変位可能に設け、発光器６および受光器７と指先位置決め部３２との間の距離寸法を変更可能にする構成としてもよい。 In the second embodiment, the distance between the light emitters 6 and 7 and the blood flow inhibition reducing unit 22 can be changed. However, the present invention is not limited to this. For example, like the pulse wave sensor device 31 according to the first modification shown in FIG. The distance dimension between the fingertip positioning unit 32 and the fingertip positioning unit 32 may be changed.
　また、図１３に示す第２の変形例による脈波センサ装置４１のように、指先位置決め部を省く構成としてもよい。この場合、利用者に対して指の置く位置を容易に認識させるために、筐体２の表面には、発光器６および受光器７の周囲に位置して、例えば指の形状を模式的に示した案内マーク４２を設けるのが好ましい。 Moreover, it is good also as a structure which excludes a fingertip positioning part like the pulse wave sensor apparatus 41 by the 2nd modification shown in FIG. In this case, in order to allow the user to easily recognize the position where the finger is placed, the surface of the housing 2 is positioned around the light emitter 6 and the light receiver 7, for example, schematically showing the shape of the finger. The guide mark 42 shown is preferably provided.
　次に、図１４は本発明の第３の実施の形態を示している。そして、本実施の形態の特徴は、筐体の表面に凹陥部を形成し、該凹陥部の底面に発光器および受光器を配置すると共に、凹陥部の底面と筐体の表面との段差を用いて血流阻害低減部および指先位置決め部を形成したことにある。なお、本実施の形態では、前記第１の実施の形態と同一の構成要素に同一の符号を付し、その説明を省略するものとする。 Next, FIG. 14 shows a third embodiment of the present invention. A feature of the present embodiment is that a concave portion is formed on the surface of the housing, a light emitter and a light receiver are disposed on the bottom surface of the concave portion, and a step between the bottom surface of the concave portion and the surface of the housing is provided. In other words, the blood flow inhibition reducing part and the fingertip positioning part are formed. In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.
　脈波センサ装置５１は、第１の実施の形態による脈波センサ装置１とほぼ同様に、筐体２、表示装置３、発光器６、受光器７等を備えている。また、筐体２の周壁部２Ｂの表面には、高さ方向に窪んだ凹陥部５２が形成されている。この凹陥部５２は、左右方向に対して指Ｆの末節Ａと同程度の長さ寸法を有し、その底面５２Ａには発光器６および受光器７が取付けられている。また、凹陥部５２の深さ寸法は、例えば第１の実施の形態による血流阻害低減部１５の突出寸法ｔと同程度の値に設定されている。 The pulse wave sensor device 51 includes a housing 2, a display device 3, a light emitter 6, a light receiver 7, and the like, almost the same as the pulse wave sensor device 1 according to the first embodiment. Further, a recessed portion 52 that is recessed in the height direction is formed on the surface of the peripheral wall portion 2B of the housing 2. The recessed portion 52 has a length similar to that of the terminal node A of the finger F in the left-right direction, and the light emitter 6 and the light receiver 7 are attached to the bottom surface 52A. Moreover, the depth dimension of the recessed part 52 is set to the same value as the protrusion dimension t of the blood flow inhibition reducing part 15 according to the first embodiment, for example.
　血流阻害低減部５３は、発光器６および受光器７の近傍に位置して筐体２に設けられ、凹陥部５２の右側の段差部分によって形成されている。このため、血流阻害低減部５３は、発光器６および受光器７よりも例えば筐体２の左右方向の右端部に位置している。 The blood flow inhibition reducing portion 53 is provided in the housing 2 in the vicinity of the light emitter 6 and the light receiver 7, and is formed by a step portion on the right side of the recessed portion 52. For this reason, the blood flow inhibition reducing unit 53 is located, for example, at the right end in the left-right direction of the housing 2 rather than the light emitter 6 and the light receiver 7.
　この血流阻害低減部５３は、凹陥部５２との境界部分に位置する角隅部５３Ａと、角隅部５３Ａから筐体２の右側に向けて延び中節Ｂに接触する接触部５３Ｂと、角隅部５３Ａから発光器６および受光器７に向けて延びた段差形成部５３Ｃとを備えている。この段差形成部５３Ｃは、発光器６および受光器７との接触面となる底面５２Ａとの間に段差を形成している。そして、利用者が筐体２の周壁部２Ｂに沿って指Ｆの末節Ａを発光器６および受光器７に接触させたときには、血流阻害低減部５３は、その接触部５３Ｂが指Ｆの中節Ｂに接触する構成となっている。 The blood flow inhibition reducing portion 53 includes a corner portion 53A located at a boundary portion with the recessed portion 52, a contact portion 53B that extends from the corner portion 53A toward the right side of the housing 2 and contacts the middle node B, A step forming portion 53C extending from the corner portion 53A toward the light emitter 6 and the light receiver 7 is provided. The step forming portion 53 </ b> C forms a step between the bottom surface 52 </ b> A serving as a contact surface with the light emitter 6 and the light receiver 7. When the user brings the terminal node A of the finger F into contact with the light emitter 6 and the light receiver 7 along the peripheral wall portion 2B of the housing 2, the blood flow inhibition reducing unit 53 has the contact portion 53B of the finger F. It is configured to contact the middle section B.
　指先位置決め部５４は、発光器６および受光器７の近傍に位置して筐体２に設けられ、凹陥部５２の左側の段差部分によって形成されている。このため、指先位置決め部５４は、発光器６および受光器７よりも末節Ａの先端側に配置されている。即ち、指先位置決め部５４は、左右方向に対して発光器６および受光器７を挟んで血流阻害低減部５３とは反対側となる位置に配置されている。そして、利用者が指Ｆの末節Ａを発光器６および受光器７に接触させたときには、指先が指先位置決め部５４のうち凹陥部５２内の傾斜面に接触すると共に、中節Ｂが血流阻害低減部５３の接触部５３Ｂに接触するものである。 The fingertip positioning portion 54 is provided in the housing 2 in the vicinity of the light emitter 6 and the light receiver 7, and is formed by a step portion on the left side of the recessed portion 52. For this reason, the fingertip positioning portion 54 is disposed on the distal end side of the terminal node A with respect to the light emitter 6 and the light receiver 7. That is, the fingertip positioning unit 54 is disposed at a position opposite to the blood flow inhibition reducing unit 53 with the light emitter 6 and the light receiver 7 interposed therebetween in the left-right direction. When the user brings the terminal node A of the finger F into contact with the light emitter 6 and the light receiver 7, the fingertip contacts the inclined surface in the recessed portion 52 of the fingertip positioning unit 54, and the middle node B flows into the bloodstream. It contacts the contact part 53B of the inhibition reducing part 53.
　かくして、第３の実施の形態でも第１の実施の形態と同様の作用効果を得ることができる。 Thus, in the third embodiment, the same operation and effect as in the first embodiment can be obtained.
　次に、図１５は本発明の第４の実施の形態を示している。そして、本実施の形態の特徴は、血流阻害低減部は、指の中節と接触する接触部と、該接触部と発光器および受光器との間に位置する窪み部とを備える構成としたことにある。なお、本実施の形態では、前記第１の実施の形態と同一の構成要素に同一の符号を付し、その説明を省略するものとする。 Next, FIG. 15 shows a fourth embodiment of the present invention. The feature of the present embodiment is that the blood flow inhibition reducing portion includes a contact portion that comes into contact with the middle node of the finger, and a recess portion that is located between the contact portion and the light emitter and the light receiver. It is to have done. In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.
　脈波センサ装置６１は、第１の実施の形態による脈波センサ装置１とほぼ同様に、筐体２、表示装置３、発光器６、受光器７等を備えている。また、筐体２の周壁部２Ｂの表面には、発光器６および受光器７よりも筐体２の右端部に位置して血流阻害低減部６２が設けられると共に、発光器６および受光器７を挟んで左右方向の反対側の位置には指先位置決め部１６が設けられている。 The pulse wave sensor device 61 includes a housing 2, a display device 3, a light emitter 6, a light receiver 7, and the like, almost the same as the pulse wave sensor device 1 according to the first embodiment. Further, a blood flow inhibition reducing portion 62 is provided on the surface of the peripheral wall portion 2B of the housing 2 at a position closer to the right end of the housing 2 than the light emitter 6 and the light receiver 7, and the light emitter 6 and the light receiver. A fingertip positioning portion 16 is provided at a position on the opposite side in the left-right direction across 7.
　また、血流阻害低減部６２は、筐体２の右側に向けて延び中節Ｂに接触する平坦面からなる接触部６２Ａと、接触部６２Ａと発光器６および受光器７との間に位置して周囲よりも凹んだ窪み部６２Ｂとを備えている。接触部６２Ａは、例えば発光器６および受光器７が設けられた筐体２の周壁部２Ｂの表面とほぼ同じ高さ位置に配置されている。また、窪み部６２Ｂは、例えば奥行き方向（指の幅方向）に対して一様な溝状に形成され、発光器６および受光器７の周囲に位置して指Ｆの末節Ａが接触する周壁部２Ｂの表面と、指Ｆの中節Ｂが接触する接触部６２Ａとの間に左右方向に対して不連続な段差を形成している。 Further, the blood flow inhibition reducing unit 62 is positioned between the contact unit 62A formed of a flat surface that extends toward the right side of the housing 2 and contacts the middle node B, and between the contact unit 62A, the light emitter 6 and the light receiver 7. And a recess 62B that is recessed from the periphery. For example, the contact portion 62A is disposed at substantially the same height as the surface of the peripheral wall portion 2B of the housing 2 in which the light emitter 6 and the light receiver 7 are provided. Further, the recess 62B is formed in a uniform groove shape in the depth direction (finger width direction), for example, and is a peripheral wall located around the light emitter 6 and the light receiver 7 and in contact with the terminal node A of the finger F A discontinuous step is formed in the left-right direction between the surface of the portion 2B and the contact portion 62A where the middle node B of the finger F contacts.
　これにより、利用者が指Ｆの末節Ａを発光器６および受光器７に接触させると共に、指Ｆの中節Ｂを接触部６２Ａに接触させたときには、末節Ａの第１関節寄りの部位は、周壁部２Ｂの表面や窪み部６２Ｂの底面等と接触しない状態になり、隙間Ｓが形成される。この結果、血流阻害低減部６２は、末節Ａの第１関節寄りの部位に対する押圧力を低下させ、末節Ａ側の血流が阻害されるのを抑制している。 As a result, when the user brings the terminal node A of the finger F into contact with the light emitter 6 and the light receiver 7 and the middle node B of the finger F contacts the contact portion 62A, the portion of the terminal node A near the first joint is The surface of the peripheral wall 2B and the bottom surface of the recess 62B are not in contact with each other, and the gap S is formed. As a result, the blood flow inhibition reducing unit 62 reduces the pressing force on the portion of the terminal node A closer to the first joint and suppresses the blood flow on the terminal node A side from being inhibited.
　かくして、第４の実施の形態でも第１の実施の形態と同様の作用効果を得ることができる。 Thus, the fourth embodiment can provide the same operational effects as the first embodiment.
　なお、第４の実施の形態では、血流阻害低減部６２の接触部６２Ａは、発光器６等が設けられた筐体２の周壁部２Ｂの表面とほぼ同じ高さ位置に配置するものとしたが、周壁部２Ｂの表面よりも高い位置に配置してもよく、低い位置に配置してもよい。指Ｆの末節Ａの第１関節寄りの部位に対する圧迫を低下させるためには、接触部６２Ａで確実に指Ｆの中節Ｂを支持し、指Ｆの末節Ａ全体に作用する押圧力を低下させた方がよい。この点を考慮すると、血流阻害低減部６２の接触部６２Ａは、周壁部２Ｂの表面と同じ高さ位置または周壁部２Ｂの表面よりも高い位置に配置するのが好ましい。 In the fourth embodiment, the contact part 62A of the blood flow inhibition reducing part 62 is disposed at substantially the same height as the surface of the peripheral wall part 2B of the housing 2 provided with the light emitter 6 and the like. However, you may arrange | position in a position higher than the surface of the surrounding wall part 2B, and may arrange | position in a low position. In order to reduce the pressure on the portion of the finger F closer to the first joint of the last joint A, the contact portion 62A securely supports the middle joint B of the finger F, and the pressing force acting on the entire last joint A of the finger F is reduced. It is better to let them. Considering this point, the contact part 62A of the blood flow inhibition reducing part 62 is preferably arranged at the same height position as the surface of the peripheral wall part 2B or a position higher than the surface of the peripheral wall part 2B.
　また、第１ないし第４の実施の形態では、筐体２の右側にのみ発光器６、受光器７、血流阻害低減部１５，２２，５３，６２等を設ける構成とした。しかし、本発明はこれに限らず、例えば図１６に示す第３の変形例による脈波センサ装置７１のように、筐体２の左側にも発光器６、受光器７を設けると共に、血流阻害低減部１５、指先位置決め部１６と左右対称な位置に、これらとほぼ同様な血流阻害低減部７２、指先位置決め部７３を設ける構成としてもよい。 In the first to fourth embodiments, the light emitter 6, the light receiver 7, the blood flow inhibition reducing portions 15, 22, 53, and 62 are provided only on the right side of the housing 2. However, the present invention is not limited to this. For example, a light emitter 6 and a light receiver 7 are provided on the left side of the housing 2 as in the pulse wave sensor device 71 according to the third modification shown in FIG. It is good also as a structure which provides the blood flow inhibition reduction part 72 and the fingertip positioning part 73 substantially the same as these in the position bilaterally symmetrical with the inhibition reduction part 15 and the fingertip positioning part 16.
　また、第１ないし第４の実施の形態では、血流阻害低減部１５，２２，５３，６２および指先位置決め部１６，５４は奥行き方向（Ｙ方向）に対して一様な形状に形成した。しかし、本発明はこれに限らず、例えば図１７に示す第４の変形例による脈波センサ装置８１のように、血流阻害低減部８２、指先位置決め部８３には、奥行き方向の途中位置に溝８４，８５をそれぞれ設ける構成としてもよい。 Further, in the first to fourth embodiments, the blood flow inhibition reducing portions 15, 22, 53, 62 and the fingertip positioning portions 16, 54 are formed in a uniform shape with respect to the depth direction (Y direction). However, the present invention is not limited to this. For example, like the pulse wave sensor device 81 according to the fourth modification shown in FIG. The grooves 84 and 85 may be provided.
　また、前記第１ないし第４の実施の形態では、発光器６は血流の下流側となる指先側に配置し、受光器７は血流の上流側となる第１関節側に配置する構成とした。しかし、本発明はこれに限らず、発光器６を血流の上流側に配置し、受光器７を血流の下流側に配置する構成としてもよい。 In the first to fourth embodiments, the light emitter 6 is disposed on the fingertip side which is the downstream side of the blood flow, and the light receiver 7 is disposed on the first joint side which is the upstream side of the blood flow. It was. However, the present invention is not limited to this, and the light emitter 6 may be disposed on the upstream side of the blood flow, and the light receiver 7 may be disposed on the downstream side of the blood flow.
　次に、図１８は本発明の第５の実施の形態を示している。そして、本実施の形態の特徴は、筐体には、指を挟んで互いに反対側の位置に発光器と受光器を設け、指を透過した透過光を用いて脈波を検出する構成としたことにある。なお、本実施の形態では、前記第１の実施の形態と同一の構成要素に同一の符号を付し、その説明を省略するものとする。 Next, FIG. 18 shows a fifth embodiment of the present invention. The feature of the present embodiment is that the casing is provided with a light emitter and a light receiver at positions opposite to each other across the finger, and a pulse wave is detected using transmitted light transmitted through the finger. There is. In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.
　脈波センサ装置９１は、筐体９２、発光器９３、受光器９４、処理回路９６等を備えている。この筐体９２は、平板状の表面をもった筐体本体９２Ａと、該筐体本体９２Ａの表面に設けられ例えば有底筒状に形勢された遮光カバー９２Ｂとによって構成されている。遮光カバー９２Ｂの開口部は、利用者が指Ｆを挿入するときの挿入口となっている。また、遮光カバー９２Ｂは、指Ｆの挿入方向に対して、遮光カバー９２Ｂの高さが狭まる構造に形成されている。これにより、指Ｆを遮光カバー９２Ｂに挿入した際に、発光器９３および受光器９４が、指Ｆの末節Ａに接触する構造になっている。 The pulse wave sensor device 91 includes a housing 92, a light emitter 93, a light receiver 94, a processing circuit 96, and the like. The casing 92 includes a casing main body 92A having a flat surface and a light shielding cover 92B provided on the surface of the casing main body 92A and shaped like a bottomed cylinder. The opening of the light shielding cover 92B serves as an insertion opening when the user inserts the finger F. The light shielding cover 92B is formed in a structure in which the height of the light shielding cover 92B is narrowed with respect to the insertion direction of the finger F. Thus, when the finger F is inserted into the light shielding cover 92B, the light emitter 93 and the light receiver 94 are in contact with the terminal node A of the finger F.
　発光器９３は、第１の実施の形態による発光器６とほぼ同様に構成され、その発光面側が筐体本体９２Ａの表面に露出した状態で筐体本体９２Ａに設けられている。この発光器９３は、利用者の指Ｆの末節Ａが接触し、指Ｆに向けて検出光となる光を照射する。 The light emitter 93 is configured in substantially the same manner as the light emitter 6 according to the first embodiment, and is provided in the housing main body 92A with its light emitting surface side exposed on the surface of the housing main body 92A. The light emitter 93 contacts the terminal node A of the user's finger F and irradiates the finger F with light serving as detection light.
　受光器９４は、第１の実施の形態による受光器７とほぼ同様に構成され、その受光面側が発光器９３側を向いた状態で遮光カバー９２Ｂの内壁面に設けられている。この受光器９４は、上下方向に対して利用者の指Ｆを挟んで発光器９３と反対側の位置に設けられている。これにより、受光器９４は、発光器９３が利用者の指Ｆに検出光を照射したときに、指Ｆを透過した透過光を受光する。 The light receiver 94 is configured in substantially the same manner as the light receiver 7 according to the first embodiment, and is provided on the inner wall surface of the light shielding cover 92B with the light receiving surface side facing the light emitter 93 side. The light receiver 94 is provided at a position opposite to the light emitter 93 with the user's finger F interposed therebetween in the vertical direction. Thereby, the light receiver 94 receives the transmitted light transmitted through the finger F when the light emitter 93 irradiates the user's finger F with detection light.
　また、筐体本体９２Ａには、発光器９３および受光器９４の左右方向の右側（指Ｆの挿入方向の手前側）に位置して指Ｆの中節Ｂと接触する血流阻害低減部１５が設けられている。さらに、遮光カバー９２Ｂの奥側には、発光器９３および受光器９４の左右方向の左側（指Ｆの挿入方向の奥側）に位置して指Ｆの指先と接触する指先位置決め部９５が設けられている。 Further, the housing main body 92A is located on the right side in the left-right direction (the front side in the insertion direction of the finger F) of the light emitter 93 and the light receiver 94 and is in contact with the middle node B of the finger F. Is provided. Further, on the back side of the light shielding cover 92B, a fingertip positioning portion 95 that is located on the left side in the left-right direction (the back side in the insertion direction of the finger F) of the light emitter 93 and the light receiver 94 and is in contact with the fingertip of the finger F is provided. It has been.
　処理回路９６は、第１の実施の形態による処理回路９とほぼ同様に構成され、その入力側が発光器９３および受光器９４に接続され、出力側が例えば表示装置（図示せず）等に接続されている。そして、処理回路９６は、発光器９３に駆動電流を供給して検出光を発光させると共に、受光器９４から指Ｆの透過光に応じた光検出信号が入力されたときに、この光検出信号を用いて光電脈波信号を抽出する。これに加えて、処理回路９６は、光電脈波信号から各種の脈波情報を生成し、表示装置を用いて表示する。 The processing circuit 96 is configured in substantially the same manner as the processing circuit 9 according to the first embodiment, and its input side is connected to the light emitter 93 and the light receiver 94 and its output side is connected to, for example, a display device (not shown). ing. The processing circuit 96 supplies a driving current to the light emitter 93 to emit detection light, and when the light detection signal corresponding to the transmitted light of the finger F is input from the light receiver 94, the light detection signal. The photoelectric pulse wave signal is extracted using. In addition to this, the processing circuit 96 generates various pulse wave information from the photoelectric pulse wave signal and displays it using a display device.
　かくして、第５の実施の形態でも第１の実施の形態と同様の作用効果を得ることができる。 Thus, the fifth embodiment can provide the same operational effects as the first embodiment.
　なお、前記第１ないし第５の実施の形態では、単一の発光器６，９３を用いる構成としたが、例えば互いに波長範囲の異なる検出光を発光する複数個の発光器を設ける構成としてもよい。 In the first to fifth embodiments, the single light emitters 6 and 93 are used. However, for example, a plurality of light emitters that emit detection lights having different wavelength ranges may be provided. Good.
　次に、図１９は本発明の第６の実施の形態を示している。そして、本実施の形態の特徴は、筐体に超音波の送信器と受信器とを設けると共に、処理回路は送信器が送信した超音波および受信器が受信した超音波に基づいて脈波信号を生成する構成としたことにある。なお、本実施の形態では、前記第１の実施の形態と同一の構成要素に同一の符号を付し、その説明を省略するものとする。 Next, FIG. 19 shows a sixth embodiment of the present invention. The feature of the present embodiment is that an ultrasonic transmitter and receiver are provided in the casing, and the processing circuit is a pulse wave signal based on the ultrasonic wave transmitted by the transmitter and the ultrasonic wave received by the receiver. It is in the structure which produces | generates. In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.
　脈波センサ装置１０１は、筐体２、送信器１０２、受信器１０３、処理回路１０４等を備えている。ここで、送信器１０２、受信器１０３は、例えば第１の実施の形態による発光器６、受光器７に代わって筐体２に設けられている。 The pulse wave sensor device 101 includes a housing 2, a transmitter 102, a receiver 103, a processing circuit 104, and the like. Here, the transmitter 102 and the receiver 103 are provided in the housing 2 in place of the light emitter 6 and the light receiver 7 according to the first embodiment, for example.
　送信器１０２は、例えば第１の実施の形態による発光器６とほぼ同じ位置に設けられ、利用者の指Ｆの末節Ａが接触し、指Ｆに向けて一定周波数の超音波を照射する。 The transmitter 102 is provided, for example, at substantially the same position as the light emitter 6 according to the first embodiment, the last node A of the user's finger F comes into contact, and the finger F is irradiated with ultrasonic waves having a constant frequency.
　受信器１０３は、例えば第１の実施の形態による受光器７とほぼ同じ位置に設けられている。そして、受信器１０３は、送信器１０２が利用者の指Ｆに超音波を照射したときに、指Ｆが反射した超音波を受信する。 The receiver 103 is provided at substantially the same position as the light receiver 7 according to the first embodiment, for example. The receiver 103 receives the ultrasonic wave reflected by the finger F when the transmitter 102 irradiates the user's finger F with ultrasonic waves.
　なお、送信器１０２は血流の下流側となる指先側に配置し、受信器１０３は血流の上流側となる第１関節側に配置する構成とした。しかし、本発明はこれに限らず、送信器１０２を血流の上流側に配置し、受信器１０３を血流の下流側に配置する構成としてもよい。 The transmitter 102 is arranged on the fingertip side which is the downstream side of the blood flow, and the receiver 103 is arranged on the first joint side which is the upstream side of the blood flow. However, the present invention is not limited to this, and the transmitter 102 may be arranged on the upstream side of the blood flow, and the receiver 103 may be arranged on the downstream side of the blood flow.
　また、筐体２には、送信器１０２および受信器１０３の左右方向の右側（指Ｆの根元側）に位置して指Ｆの中節Ｂと接触する血流阻害低減部１５が設けられると共に、送信器１０２および受信器１０３の左右方向の左側（指Ｆの指先側）に位置して指Ｆの指先と接触する指先位置決め部１６が設けられている。 In addition, the housing 2 is provided with a blood flow inhibition reducing unit 15 that is located on the right side in the left-right direction (the base side of the finger F) of the transmitter 102 and the receiver 103 and contacts the middle node B of the finger F. A fingertip positioning unit 16 that is located on the left side (fingertip side of the finger F) of the transmitter 102 and the receiver 103 and is in contact with the fingertip of the finger F is provided.
　処理回路１０４は、送信器１０２に駆動電圧、電流を供給すると共に、受信器１０３の検出信号に基づいて脈波信号を生成する。具体的に説明すると、送信器１０２が指Ｆに一定周波数の超音波を照射すると、指Ｆからの反射波には血流によるドップラー効果が生じる。このため、処理回路１０４は、このドップラー周波数とドップラー変位周波数のスペクトルに基づいて、例えば血液の平均流速に応じた脈波信号を生成する。さらに、処理回路１０４は、この脈波信号に基づいて各種の脈波情報を生成し、表示装置（図示せず）を用いて表示する。 The processing circuit 104 supplies a driving voltage and current to the transmitter 102 and generates a pulse wave signal based on the detection signal of the receiver 103. More specifically, when the transmitter 102 irradiates the finger F with an ultrasonic wave having a constant frequency, a reflected wave from the finger F has a Doppler effect due to blood flow. For this reason, the processing circuit 104 generates a pulse wave signal corresponding to, for example, the average blood flow velocity based on the spectrum of the Doppler frequency and the Doppler displacement frequency. Further, the processing circuit 104 generates various pulse wave information based on the pulse wave signal, and displays it using a display device (not shown).
　かくして、第６の実施の形態でも第１の実施の形態と同様の作用効果を得ることができる。 Thus, in the sixth embodiment, the same function and effect as in the first embodiment can be obtained.
　なお、第５，第６の実施の形態では、第１の実施の形態による血流阻害低減部１５を用いる構成としたが、例えば第２ないし第４の実施の形態による血流阻害低減部２２，５３，６２や指先位置決め部５４を用いる構成としてもよい。また、第５，第６の実施の形態では、血流阻害低減部９５，１６を用いる構成としたが、例えば第３の実施の形態による指先位置決め部５４を用いる構成としてもよい。 In the fifth and sixth embodiments, the blood flow inhibition reducing unit 15 according to the first embodiment is used. However, for example, the blood flow inhibition reducing unit 22 according to the second to fourth embodiments is used. , 53, 62 and the fingertip positioning portion 54 may be used. In the fifth and sixth embodiments, the blood flow inhibition reducing units 95 and 16 are used. However, for example, the fingertip positioning unit 54 according to the third embodiment may be used.
　また、前記各実施の形態では、脈波センサ装置１，２１，３１，４１，５１，６１，７１，８１，９１，１０１は、筐体２，９２に処理回路９，９６，１０４および表示装置３を設け、携帯型の装置を構成する場合を例に挙げたが、本発明はこれに限らない。例えば脈波センサ装置を、例えば発光器６、受光器７等のように光検出信号を検出するのに必要な構成要素を有する検出セクションと、処理回路９，９６，１０４等のように、検出セクションにおいて検出された光検出信号に対して信号処理を行い、脈波情報を生成する処理を行うのに必要な構成要素を有する演算処理セクションとに分離し、検出セクションを携帯型の装置として形成し、演算処理セクションを例えば机上型の装置として形成してもよい。また、検出セクションおよび演算処理セクションを例えば筐体としての検査台に設け、これら全体を机上型の装置として形成してもよい。 In each of the above embodiments, the pulse wave sensor devices 1, 21, 31, 41, 51, 61, 71, 81, 91, 101 have the processing circuits 9, 96, 104 and the display device in the casings 2, 92. 3 is provided as an example to constitute a portable device, but the present invention is not limited to this. For example, a pulse wave sensor device is detected such as a detection section having components necessary for detecting a light detection signal, such as a light emitter 6 and a light receiver 7, and processing circuits 9, 96, 104, and the like. Signal processing is performed on the light detection signal detected in the section, and it is separated into an arithmetic processing section having components necessary for performing processing for generating pulse wave information, and the detection section is formed as a portable device However, the arithmetic processing section may be formed as a desktop type device, for example. Further, the detection section and the arithmetic processing section may be provided, for example, on an inspection table as a housing, and the whole may be formed as a desktop device.
　さらに、前記各実施の形態では、利用者の人差し指Ｆによって脈波を検出する構成としたが、中指、薬指等のように他の指によって脈波を検出する構成としてもよい。 Furthermore, in each said embodiment, it was set as the structure which detects a pulse wave with a user's index finger F, However, It is good also as a structure which detects a pulse wave with another finger like a middle finger, a ring finger, etc.
　１，２１，３１，４１，５１，６１，７１，８１，９１，１０１　脈波センサ装置
　２，９２　筐体
　６，９３　発光器
　７，９４　受光器
　９，９６，１０４　処理回路
　１５，１７，２２，５３，６２，７２，８２　血流阻害低減部
　１５Ｃ，１７Ｂ，２２Ｂ，５３Ｂ，６２Ａ　接触部
　１５Ｅ，１７Ｃ，２２Ｃ，５３Ｃ　段差形成部
　１６，３２，５４，７３，８３，９５　指先位置決め部
　６２Ｂ　窪み部
　１０２　送信器
　１０３　受信器 1, 21, 31, 41, 51, 61, 71, 81, 91, 101 Pulse wave sensor device 2, 92 Case 6, 93 Light emitter 7, 94 Light receiver 9, 96, 104 Processing circuit 15, 17, 22 , 53, 62, 72, 82 Blood flow inhibition reducing portion 15C, 17B, 22B, 53B, 62A Contact portion 15E, 17C, 22C, 53C Step forming portion 16, 32, 54, 73, 83, 95 Fingertip positioning portion 62B Dimple Part 102 transmitter 103 receiver

Claims (5)

  1. 　筐体と、該筐体に設けられた発光器と、前記筐体に設けられた受光器とを備え、指の末節を用いて脈波を検出する脈波センサ装置において、
    　前記筐体における前記指の末節が接触する位置に前記発光器および前記受光器を配設すると共に、
    　前記指の末節を前記発光器および前記受光器に接触させたときに、前記指の中節と接触する血流阻害低減部を前記筐体に設け、
    　該血流阻害低減部における前記指の中節が接触する接触部と、前記指の末節が接触する前記筐体との間に段差を形成して、
    　前記指の末節における第１関節部位およびその周辺に作用する圧迫を小さくし、前記指の末節における血流の阻害を低減することを特徴とする脈波センサ装置。     In a pulse wave sensor device comprising a housing, a light emitter provided in the housing, and a light receiver provided in the housing, and detecting a pulse wave using a terminal node of a finger,
    While disposing the light emitter and the light receiver at a position where the terminal node of the finger in the housing contacts,
    When the terminal node of the finger is brought into contact with the light emitter and the light receiver, a blood flow inhibition reducing portion that comes into contact with the middle node of the finger is provided in the housing,
    A step is formed between the contact portion where the middle node of the finger contacts in the blood flow inhibition reducing portion and the housing where the terminal node of the finger contacts,
    A pulse wave sensor device characterized by reducing the pressure acting on the first joint portion and its periphery at the terminal node of the finger, and reducing the inhibition of blood flow at the terminal node of the finger.
  2. 　筐体と、該筐体に設けられた超音波の送信器と、前記筐体に設けられた超音波の受信器とを備え、指の末節を用いて脈波を検出する脈波センサ装置において、
    　前記筐体における前記指の末節が接触する位置に前記送信器および前記受信器を配設すると共に、
    　前記指の末節を前記送信器および前記受信器に接触させたときに、前記指の中節と接触する血流阻害低減部を前記筐体に設け、
    　該血流阻害低減部における前記指の中節が接触する接触部と、前記指の末節が接触する前記筐体との間に段差を形成して、
    　前記指の末節における第１関節部位およびその周辺に作用する圧迫を小さくし、前記指の末節における血流の阻害を低減することを特徴とする脈波センサ装置。     In a pulse wave sensor device that includes a casing, an ultrasonic transmitter provided in the casing, and an ultrasonic receiver provided in the casing, and detects a pulse wave using a terminal node of a finger ,
    While disposing the transmitter and the receiver at a position where the terminal node of the finger in the housing contacts,
    When the terminal segment of the finger is brought into contact with the transmitter and the receiver, a blood flow inhibition reducing portion that contacts the middle segment of the finger is provided in the housing,
    A step is formed between the contact portion where the middle node of the finger contacts in the blood flow inhibition reducing portion and the housing where the terminal node of the finger contacts,
    A pulse wave sensor device characterized by reducing the pressure acting on the first joint portion and its periphery at the terminal node of the finger, and reducing the inhibition of blood flow at the terminal node of the finger.
  3. 　前記血流阻害低減部によって形成された段差により、前記指の末節における第１関節寄りの領域と、前記筐体の表面との間に隙間を形成したことを特徴とする請求項１または２に記載の脈波センサ装置。 3. The gap according to claim 1, wherein a gap is formed between a region near the first joint at the terminal node of the finger and the surface of the housing by the step formed by the blood flow inhibition reducing unit. The described pulse wave sensor device.
  4. 　前記指の先端が接触する前記筐体の表面位置に指先位置決め部を設けたことを特徴とする請求項１または２に記載の脈波センサ装置。 3. The pulse wave sensor device according to claim 1 or 2, wherein a fingertip positioning portion is provided at a surface position of the casing where the tip of the finger comes into contact.
  5. 　前記血流阻害低減部には、前記指の中節との接触位置を調整する機構を設けたことを特徴とする請求項１または２に記載の脈波センサ装置。 The pulse wave sensor device according to claim 1 or 2, wherein the blood flow inhibition reducing unit is provided with a mechanism for adjusting a contact position with the middle node of the finger.
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